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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 528220: solve the following sysem ofequations.
x+3=5(1)
x=3-3y(2)
What is the solution of the system?

Click here to see answer by Maths68(1474)

Question 528267: can you solve for x and y with these.
y=2x and 6x-y=8
Click here to see answer by scott8148(6628)

Question 528390: 13x-11y=-12
Click here to see answer by Alan3354(30993)

Question 528396: linear algebra elimination method
13) 2/3x+2/5y=4/5
1/2x+2/3y=-1/2
12)9/14x+y=19/7
-20x+21y=144
11)x+5/3y=7/3
2/5x-y=3/5
10)x+9/4y=7/4
5/9x-y=2/9
8)18x-3y=-3
6x+7y=39
6)15x+14y=2
12x-6y=-7
Click here to see answer by Edwin McCravy(8909)

Question 528732: the length of a rectangle is 20ft. less than twice the width. of the perimeter of the rectangle is 260ft. find the length and width of the rectangle

Click here to see answer by mathstutor494(95)

Question 529048: how would you solve this to graph?
3x-y=-2
3x-y=0
Click here to see answer by solver91311(16897)

Question 529222: how to solve this 2x+3y=17
Click here to see answer by lmeeks54(105)

Question 529326: when y = 3, which of the following is false
y is prime and y is odd
y is odd or y is even
y is not prime and y is odd
y is odd and 2y is even
Click here to see answer by stanbon(57387)

Question 529302: Dear tutors:
I have 3 problems due this evening involving using set builder notations
1) x+2 is greater than/equal to -3/11
2) -5/6x > 4/11
3) -10 (x+1) is less than/equal to 12x+7
Any help is appreciated.
kathrynneconway@yahoo.com

Click here to see answer by nerdybill(6962)

Question 529465: Determine whether the point (0, -8) is a solution of the system
-3x + 9y = 72
9x + 3y = 24
by substituting the point into each equation.

Click here to see answer by stanbon(57387)

Question 529411: I hope it is not too late in the evening to ask a question. But can someone
solve this equation by clearing the fractions?
-x+2/5=5-4/3x
Thanks
kathrynenconway@yahoo.com
Click here to see answer by ankor@dixie-net.com(15660)

Question 529563: Use elimination method to find all solutions of the system of equations.
8x+4y-112
40x+2y=380
Click here to see answer by lmeeks54(105)

Question 529564: Use elimination method to find all solutions of the systems of equations.
4x^2-y^2=75
x^2+5y^2=150
Click here to see answer by ankor@dixie-net.com(15660)

Question 529758: is 9x-8=3(x+1) a linear equation?
Click here to see answer by jim_thompson5910(28598)

Question 529767: Elimination

5x+y=9
10x-7y=-18

Click here to see answer by swincher4391(726)

Question 530090: Use the method of substitution to solve the system. (Enter your answer(s) as ordered pair(s). If there is more than one ordered pair, use commas between ordered pairs.)

y2−4x2=19
9y2+16x2=275

Click here to see answer by unlockmath(1603)

Question 530140: A boat takes 4 hours to travel 36 miles downstream and 12 hours for the return trip. What is the speed of the current and the speed of the boat in still water?
Click here to see answer by KMST(1870)

Question 530089: Use the method of substitution to solve the system:(Enter your answer(s) as ordered pair(s). If there is more than one ordered pair, use commas between ordered pairs.)
xy=2
5x-y+9=0
Click here to see answer by ankor@dixie-net.com(15660)

Question 530221: solve by substitution y=0.5x+2 and -y=-2x+4
Click here to see answer by jim_thompson5910(28598)

Question 530230: solve by substitution x+2y=8 and x+3y=12
Click here to see answer by jim_thompson5910(28598)

Question 530229: solve by substitution 2x+2y=2 and -4x+4y=12
Click here to see answer by user_dude2008(1861)

Question 530226: solve by substitution 4x=y-1 and 6x-2y=-3
Click here to see answer by user_dude2008(1861)

Question 530225: solve by substitution 3x+y=-8 and -2x-y=6
Click here to see answer by user_dude2008(1861)

Question 530260: Solve the following system of equations.
x + 3y + 2z = –16
2x – y + 2z = –15
2x – 2y – z = 1

Click here to see answer by Math_prodigy(21)

Question 530267: 1) 2 men and 7 boys can do a piece of work in 4 days. The same work is done by 4 men and 4 boys in 3 days. How long would it take 1 man and 1 boy to do the same?
Click here to see answer by Edwin McCravy(8909)

Question 530362: a^7+a^7+a^7 is equivalent to what?
Click here to see answer by jim_thompson5910(28598)

Question 530554: Solve the system shown. Put your answer in (x, y) format with no spaces.
2x + 9y = 0
3x + 5y = 17
Click here to see answer by oberobic(2304)

Question 530555: Solve the system shown. Put your answer in (x, y) format with no spaces.
2x + 9y = 0
3x + 5y = 17
Click here to see answer by oberobic(2304)

Question 530637: `Graph the following 2y=10
Find two points on the line to be graphed and enter their coordinates in the
boxes below.
A: _______ , ________
B: _______ , ________
Click here to see answer by oberobic(2304)

Question 530934: Hello. I am having trouble with the following question. Can you please help?
500 tickets were sold for a music concert. Adult tickets sold for $7.50 and children tickets sold for $4. Total ticket sales were $3312.50. How many of each kind of ticket were sold?
Click here to see answer by oberobic(2304)

Question 531104: how do i solve these equations for an ordered triple?
x+Y-5z=-5
y-2z=14
4y-2z=8
Click here to see answer by Alan3354(30993)

Question 531439: Solve the system. Enter answer as an ordered pair (t,v).
1/2t - 1/5v = 5/2
2/3t + 1/4v = 7/12
Click here to see answer by stanbon(57387)

Question 531495: good afternoon, please help me solve this problem:
Kelly Fisher has a total of $26,000 invested in two municipal bonds that have yields of 8% and 10% interest per year, respectively. If the interest Kelly receives from the bonds in a year is $2422, how much does she have invested in each bond?
Let x = the amount in the first bond.
Let y = the amount in the second bond.
Click here to see answer by scott8148(6628)

Question 531618: HOw can you tell which type system you have by looking at just the two linear equations.
Click here to see answer by solver91311(16897)

Question 531699: what is another equation for y=5x-3
Click here to see answer by KMST(1870)

Question 531829: The point (46,0) lies on the line 2x + 10y = 92 determine if this point is a solution of the system.
2xy + 10y = 92
-6x - 2y = -24
Click here to see answer by KMST(1870)

Question 532013: -4x-22=-6x+(-36)
-4x=-6x-36+22
-4x+6x=-36+22
2x=-14
x=-14/2
x=-7
Click here to see answer by Stones101(2)

Question 531853: 6z+2z-6+5
8Z-1
Click here to see answer by Stones101(2)

Question 532169: 2x+4y=-3
Click here to see answer by oberobic(2304)

Question 532313: A basketball player makes a total of 517 shots totaling 1037 points. How many of those shots are 3 point shots and how many are 2 point shots?
From the examples in the book, I should have 2 equations:
x + y = 517
2x + 3y = 1037
Is this right?
How do I begin to solve?
Click here to see answer by oberobic(2304)

Question 532524: What is the answer to this linear equation:
n/3-1=2
Click here to see answer by MsRedz123(24)

Question 532972: Solve the system using the addition method. If there is no solution or if there are many solutions and the system's equations are dependent, so state. The three equations are:
6x-y+3z+22
x+3y-z=-4
3x+3y-4z=-9
I am having to do my homework on course compass (AKA mathlab) and only get 3 chances to enter in my answer before it giving me a new problem. This is what I have done so far to get an answer and it telling me my answer is wrong.
I took equation 1 and 3 and eliminated X and got another equation which is now equation 4. I then took equation 2 and 3 and eliminated X and got my 5th equation. I then added equation 4 and 5 and eliminated Z which gave my my Y answer. I then plugged my Y answer in to equation 5 and got my Z. I then took my Y and Z answers and plugged them into equation 1 to get my X. Somewhere in the mess of it all, I got the wrong answers. Can you help me?
Thanks,
Lexi
Click here to see answer by scott8148(6628)

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