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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 253900: please solve 3x+2y=20
Click here to see answer by checkley77(12844)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by jim_thompson5910(35256)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by dabanfield(803)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by drk(1908)

Question 253988: 3x+4y-3z=5
x+6y+2z=3
6x+2y+3z=4
Click here to see answer by jim_thompson5910(35256)

Question 254012: a+b+c=12
a=5b
a+c=9
Click here to see answer by edjones(8007)

Question 253998: a+b+c=18
8a=b+c
a+c=11
Click here to see answer by edjones(8007)

Question 253930: Solve the equation \frac(1)(4) y - 4 = \frac(1)(8) y .
and
Solve for x:
1/4 x + 1/2 = 4(5/6 x + 1)
thanks
Click here to see answer by Alan3354(69443)

Question 254019: √x^16/√4x^8
Click here to see answer by stanbon(75887)

Question 254038: Solve by graphing. Write no solution or infinetly many solutions where appropriate.

Please and thank you.
Click here to see answer by stanbon(75887)

Question 254044: I'm sorry, you may have already seen this question, but that was because I submitted it in the wrong section.
"Use the graph to solve the linear system. Check your solution algebraically."
The intersecting point is at (6,-2)
-x+y=8
x+9=4
What do I do next? How do I check the solution?
I am in Alegbra I, second semester Honors, and I am struggling with these problems. Please help!

Click here to see answer by richwmiller(17219)

Question 254227: Hi I have this word problem I need help on figuring out the formula to use. the problem reads.
A skirt and a blouse together cost $75. The skirt costs $15 more than the blouse. What is the cost of the skirt? What is the cost of the blouse?
I would greatly appreciate your help on this problem Thank you
Scott
Click here to see answer by richwmiller(17219)

Question 254243: Go the the grocery store to purchase coke and sprite. You have $10. Coke is $1.20 each and sprite is .80. What is the linear model of the situation.
Click here to see answer by drk(1908)

Question 254314: what is the answer to (5x-6y)-(3x+9y)=
Click here to see answer by drk(1908)

Question 254330: Solve each system using substitution. Write no solution or infinitely many solutions where appropriate.

Please and Thank You!
Click here to see answer by drk(1908)

Question 254349: Solve each system using substition. Write no solution or infinitely many solutions where appropriate.

PLEASE AND THANK YOU!!
Click here to see answer by stanbon(75887)

Question 254355: how do you graph a linear equation?
Click here to see answer by Alan3354(69443)

Question 254356: Factor the expression 8x^4 - 8x^3 - 6x^2
Click here to see answer by stanbon(75887)

Question 254356: Factor the expression 8x^4 - 8x^3 - 6x^2
Click here to see answer by richwmiller(17219)

Question 254421: x-1=y+1
x+1=2(y-1)
Click here to see answer by palanisamy(496)

Question 254419: x-1=y+1
x+1=2(y-1)
Click here to see answer by richwmiller(17219)

Question 254498: A man has a collection of 29 classic cars and motorcycles. The total number of wheels for both the cars and motorcycles is 96. How many cars does this man have?
Click here to see answer by richwmiller(17219)

Question 254512: A man has a collection of 29 classic cars and motorcycles. The total number of wheels for both the cars and motorcycles is 96. How many cars does this man have? The answer is 19 cars and 10 motorcycles. What are the steps taken to solve the equation.

Click here to see answer by JimboP1977(311)

Question 254511: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $12360?
Click here to see answer by ankor@dixie-net.com(22740)

Question 254629: x+y=10
2x=y-13
Click here to see answer by drk(1908)

Question 254689: I am trying to solve an equation using a graph. 11=4x+3 I dont understand where I need to plot the numbers. Please help..my email is carlwamt@metrocast.net
Click here to see answer by richwmiller(17219)

Question 254721: Trying to solve by substitution method.
4x + 7y = 36
x = 19 - 3y
Click here to see answer by drk(1908)

Question 254721: Trying to solve by substitution method.
4x + 7y = 36
x = 19 - 3y
Click here to see answer by jim_thompson5910(35256)

Question 254840: Is the relationship
linear? Tell how you decided. Write the equation for each linear relationship

Thank you in advance!
x 5 10 15 20 25 30
y 20 30 40 50 50 50
Click here to see answer by stanbon(75887)

Question 254857: Hi! I need help with this direct variation equation.
It says If y=4 when x=2, find y when x=16.
How do you solve this?
Thanks -Drea
Click here to see answer by nerdybill(7384)

Question 254857: Hi! I need help with this direct variation equation.
It says If y=4 when x=2, find y when x=16.
How do you solve this?
Thanks -Drea
Click here to see answer by richwmiller(17219)

Question 254867: Hi! I need help with this equation. The directions read determine if each equation is a direct variation. If it is, find the constant of variation. The first equation is 2y=5x+1
-Thanks -Drea
Click here to see answer by richwmiller(17219)

Question 254864: how would I write an equation for the following linear relationships:
(x5,y20),(x10,y30)(x15,y40)(x20,y50)(x25,y50)(x30,y50)
Click here to see answer by richwmiller(17219)

Question 254873: x+10=-7x-2
Click here to see answer by unlockmath(1688)

Question 254869: 6x-2y=8
-4x+6y=18
Click here to see answer by jim_thompson5910(35256)

Question 254999: 3(X+2)=2X-7
Click here to see answer by richwmiller(17219)

Question 255040: Problem:
Two long-distance runners leave the starting gate, one running 10 mph and the other 7 mph. If they maintain the pace, how long will it take for them to be one-quarter of a mile apart?
Formula for to develop the problem needed.
Click here to see answer by Greenfinch(383)

Question 255076: solve for X
5X + 3Y = 8X - 9Y
Click here to see answer by CharlesG2(834)

Question 255076: solve for X
5X + 3Y = 8X - 9Y
Click here to see answer by richwmiller(17219)

Question 255102: How would i solve this linear equation? x+3y=6 using intercepts and checkpoints?
Click here to see answer by richwmiller(17219)

Question 255118: solve the following systems of equations and state if the lines are parallel:
y+4x+5=2
y+3x=2
Click here to see answer by richwmiller(17219)

Question 255118: solve the following systems of equations and state if the lines are parallel:
y+4x+5=2
y+3x=2
Click here to see answer by Alan3354(69443)

Question 255248: A total of 416 tickets were sold for the school play. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?
Click here to see answer by palanisamy(496)

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