Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 163302: Please help
Solve for x and y
4x-7y=8
3x-8y=5
I tried doing the elimination method by multiplying the top equation by -3 and the bottom by 4 so I could eliminate the x part but then I got stuck.
Click here to see answer by elima(1433)

Question 163312: Solve by the elimination method.
0.3x - 0.2y = 4
0.5x + 0.3y = 1
What is the solution of the system?
(Type and ordered pair.)
(Type an integer or a fraction. Type N if there is no solution. Type I if there are infinitely many solutions.)
Click here to see answer by checkley77(12844)

Question 163527: Hi i will like the process to solve this equiation for make the graphic x,y
y=5/2x+1 and 2x-3y=-9 thanks
Click here to see answer by vleith(2983)

Question 163733: 2x-y-11
2x=3y=7
This equation has brackets on the left encompassing both problems. Not sure how to even attempt or explain this to my daughter. Can you help?
Click here to see answer by checkley77(12844)

Question 163957: -4=2+2a
Click here to see answer by elima(1433)

Question 164090: Solve each of the following systems by substitution:
5x - 6y = 21
x - 2y = 5
Click here to see answer by jim_thompson5910(35256)

Question 164128: Billy is twice as old as his son. In 10 years, the ratio of their age will be 3:5. find their age.
Click here to see answer by checkley77(12844)

Question 164195: Solve by Elimination or substitution Method

3x - 2y = 8
-12x + 8y = 32

Click here to see answer by oscargut(2103)

Question 164098: Determine whether the equation is a conditional or an identity:
5(x-1)=6x-x-5
My textbook does not give an example of this lengthy equation
Click here to see answer by jojo14344(1513)

Question 164199: . Solve by substitution or elimination method:
-4x + 3y = 5
12x - 9y = -15

Click here to see answer by Fombitz(32388)

Question 164198: . Solve by substitution or elimination method:
7x - 5y = 14
-4x + y = 27

Click here to see answer by Fombitz(32388)

Question 164227: Do all graphs of linear equations have y-intercepts? Why or why not?
Click here to see answer by jim_thompson5910(35256)

Question 164243: Explain the differences among a consistent system, an inconsistent system, and a dependent system.
Click here to see answer by padmameesala(42)

Question 164346: I want to solve the problem:
The sum of the real numbers {x} and {y} is {11}. Their difference is {5}. What is the value of {xy}?: The sum of the real numbers {x} and {y} is {11}. Their difference is {5}. What is the value of {xy}?
I found the answer:
8+3=11
8-3=5
x=8
y=3
xy=24
But, I would like to know how the #'s of 8 and 3 were determined.
Also, I am an older student about to enter college. I need to know the best instructional method for beginning to intermediate algebra. I did not do well with it in high school which was a long time ago.
Click here to see answer by jim_thompson5910(35256)

Question 164196: Solve system by the substitution method and indicate wheter each system is independent, inconsistent or dependent
x=1/8y-1
y=1/4x+39
Any help is appreciated.
Click here to see answer by ankor@dixie-net.com(22740)

Question 164336: Saidhari bought a toaster for $60. The price was 1/4 off the list price. What was the list price?
Click here to see answer by checkley77(12844)

Question 164534: Hi, I need help with this problem, I have tried everything. Here it is: The difference of two numbers is 33. If four times the lesser number is subtracted from three times the greater number, the difference is 62. Find the number.
The directions say to choose a variable & use it with the given facts. Then write an open sentence that represents the relationship among the numbers in the problem. Finally, solve the open sentence and find the required numbers.
Thank you so much for your help!
Click here to see answer by jim_thompson5910(35256)

Question 164537: COIN PURSE CONTAINS A MIXTURE OF 15 COINS IN DIMES AND QUARTERS. THE COINS HAVE A TOTAL VALUE OF $3.30. DETERMINE THE NUMBER OF DIMES AND THE NUMBER OF QUARTERS IN THE PURSE.
Click here to see answer by jojo14344(1513)

Question 164579: can someone help me with this problem:
Determine whether the given ordered set of numbers is a solution of the system of equations. yes or no.
(1, -3)
x + y = -2
x - y = 4
Click here to see answer by jim_thompson5910(35256)

Question 164703: Solve the system by addition.
5x - 3y = 13
4x - 3y = 11
Click here to see answer by checkley77(12844)

Question 164702: Solve the system by substitution.
4x - 4y = -16
y = 5x - 8
Click here to see answer by checkley77(12844)

Question 164701: The length of a rectangle is 8 in more than twice its width. If the perimeter of the rectangle is 34 in, find the width of the rectangle.
Click here to see answer by checkley77(12844)

Question 164699: Solve the system by addition or substitution.
4x - 4y = -16
y = 5x - 8
Click here to see answer by checkley77(12844)

Question 164735: y = 3x + 6
-6x + 2y = 12
Solve by using the substitution method
Click here to see answer by checkley77(12844)

Question 164734: 4x - 3y = 10
y - 20 = -6x
Solve by addition method
Click here to see answer by checkley77(12844)

Question 164861: Find the solution to the following system of linear equations:
3x + 4y =-8

Not sure how to work this problem out thank you.
Click here to see answer by Fahad_Algebra(1)

Question 164861: Find the solution to the following system of linear equations:
3x + 4y =-8

Not sure how to work this problem out thank you.
Click here to see answer by Alan3354(69443)

Question 164865: Write an equation of the line through the given point with the given slope in slope intercept form. (3,3); m=-6
Click here to see answer by gonzo(654)

Question 164865: Write an equation of the line through the given point with the given slope in slope intercept form. (3,3); m=-6
Click here to see answer by padmameesala(42)

Question 164865: Write an equation of the line through the given point with the given slope in slope intercept form. (3,3); m=-6
Click here to see answer by MRperkins(300)

Question 164929: solve the system
4x+9y=5
2x-6y=-1
Click here to see answer by checkley77(12844)

Question 164945: What is the formula for perimeter of a rectangle.
Click here to see answer by checkley77(12844)

Question 164944: One number is 12 more than the other. The sum of the smaller number and twice the larger number is 39. Find the larger number.
Click here to see answer by checkley77(12844)

Question 164944: One number is 12 more than the other. The sum of the smaller number and twice the larger number is 39. Find the larger number.
Click here to see answer by Mathtut(3670)

Question 164969: I need help solving this question:
Solve the following system for x and y:

Click here to see answer by ankor@dixie-net.com(22740)

Question 164969: I need help solving this question:
Solve the following system for x and y:

Click here to see answer by Mathtut(3670)

Question 164973: Find the solution to the following system of linear equations:

3x + 4y = -8 and
y = -5x - 7
Thank you
Click here to see answer by jim_thompson5910(35256)

Question 164983: solve by substitution:

Click here to see answer by Alan3354(69443)

Question 165085: Solve each system by substitution or addition, whichever is easier.
52. 2y � x = 3
x = 3y - 5

Click here to see answer by jim_thompson5910(35256)

Question 165162: I need to solve and graph this linear equation:
2x+3y=4. Thanks
Click here to see answer by jojo14344(1513)

Question 165248: a motorcycle breaks down and the rider must walk the rest of the way to work.The motorcyle was riden 45mph and the rider walks at the speed of 6mph. the distance from home to work is 25mi.And the total of the trip was 2hrs. How far did the motorcycle go before it broke down?
Question how do you set this system of equation up?
Click here to see answer by checkley77(12844)

Question 165249: a motorcycle breaks down and the rider must walk the rest of the way to work.The motorcyle was riden 45mph and the rider walks at the speed of 6mph. the distance from home to work is 25mi.And the total of the trip was 2hrs. How far did the motorcycle go before it broke down?
Question how do you set this system of equation up?
ISBN-10 0-321-33191-5
Chapter 13
Click here to see answer by checkley77(12844)

Question 165268: There are two numbers whose sum is 50. Three times the first is five more than twice the second. What are the numbers?
Please DO answer quickly.
Click here to see answer by jim_thompson5910(35256)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515