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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 549421: what is the solution to the system of equations of 2x-7y=17 and 3x+4y=11
Click here to see answer by mananth(12270)

Question 549472: i would like work shown please,using the substitution method
x=-3-y
5x-3y=1

Click here to see answer by TutorDelphia(193)

Question 549471: 1. -4x-5y=-2
y=-14-8x

Click here to see answer by mananth(12270)

Question 549574: given the linear equation y = 7/6x +1 find the y cooridinates for points (-6, ) (0, ) (6, )
Click here to see answer by solver91311(16897)

Question 549632: (18,2), 3y=x-12
Click here to see answer by richwmiller(9143)

Question 549645: I need help on solving a linear system using elimination.
The question is
a/2 + b/3 = 1
a/4 - 2b/3 = -1
Thank you very much! (I may need your help for many things in math as well!:))
Click here to see answer by Alan3354(30993)

Question 549659: Hello,
I have the following system of equations. When I first tried to solve the problem using elimination (getting rid of y in 1&2), the whole problem canceled out. The same thing happened when I tried to eliminate z. I did finally solve the problem but only after trial and error using elimination.
Is there a way to recognize which variables are best to eliminate or at least which ones can not be eliminated?
Thanks.
2x-2y-4z=-2
3x-3y-6z=-3
-2x+3y+z=7
Click here to see answer by Edwin McCravy(8912)

Question 549693: is the function y=4x-4 linear,if so,graph the function
Click here to see answer by Earlsdon(6287)

Question 549722: x+y=1 2x-y=-2

Click here to see answer by mananth(12270)

Question 549723: x+y=1 2x-y=-2

Click here to see answer by mananth(12270)

Question 549767: Hi, I am completely confused on how to do this equation. Here's the equation:
3x+2y=A
5x+y=B

I have tried to work the problem out and I don't even know how to start.I have to solve this by the multiplication method to find x and y. Is there anyway you could help me please? Thanks!
Click here to see answer by mathie123(224)

Question 549769: Which of the graphs below represent the graphical solution to the following system of equations?
3x – 4y = 32
5x + 2y = 10
Click here to see answer by mathie123(224)

Question 549793: 4. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-2x + 3y = -37.5
-4x + 0y = -24

Click here to see answer by jim_thompson5910(28598)

Question 549803: 10x+15y=20
-9x-15y=-21
Click here to see answer by jim_thompson5910(28598)

Question 549940: how do you graph an linear equation ?
Click here to see answer by jim_thompson5910(28598)

Question 550350: Im unable to graph the equations on my TI-83! I must be doing something wrong! I am sorry that I was unable to post the pictures on here too!
5.
Match the correct graph with the given equation.
7x - y + 7z = 7
6.
Match the correct graph with the given equation.
2x - 3y + 3z = 6

Click here to see answer by stanbon(57395)

Question 550363: 5x - 3y = 8
-5x + y = 4

Click here to see answer by jim_thompson5910(28598)

Question 550361: find an equation in slope intercept form for the line.
through (-2,3) perpendicular to y=2x+5
Click here to see answer by TutorDelphia(193)

Question 550398: 8x3y3 divided by 2x-y
Click here to see answer by Alan3354(30993)

Question 550476: HELLLLPPPP PLEASE....solve using subtraction method 7x + 6y = -5 and -7x + y = 40....type an ordered pair
Click here to see answer by jim_thompson5910(28598)

Question 550485: HEEEEELLLPPPP please.....solve by the elimination method....... x + 4y = 21 and -x + 3y = 0.......type an ordered pair
Click here to see answer by jim_thompson5910(28598)

Question 550486: HHHHEEELLLPPPP.....one more please??? solve using substitution method......5x + 7y = -23 and -8x + y = 49 type an ordered pair
Click here to see answer by scott8148(6628)

Question 550506: HELP!!!!! PLEASE........solve using substitution method....
8x + 2y = 0
-7x + y = 22
type an ordered pair
Click here to see answer by jim_thompson5910(28598)

Question 550512: -2x – 8y = -42
-4x + 6y = -18
Click here to see answer by jim_thompson5910(28598)

Question 550539: HELP PLEASE?????
solve using substitution method
3x + 9y = 57
-7x + y = 65
type an ordered pair
Click here to see answer by jim_thompson5910(28598)

Question 550711: solve the system of equations by graphing. then classify the system: 4x-y=10 4x+5y=-26
Click here to see answer by stanbon(57395)

Question 550713: -8x – 4y = -68
x + 3y = 16
Click here to see answer by jim_thompson5910(28598)

Question 550736: -8x – 2y = -28
-3x + 5y = 47

Click here to see answer by jim_thompson5910(28598)

Question 550785: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-x + 6y = 54
3x + y = 9
robert.russell1969@yahoo.com
Click here to see answer by jim_thompson5910(28598)

Question 551102: 7x-8y=11
8x-7y=7
Click here to see answer by jim_thompson5910(28598)

Question 551000: give an counterexample for the foolowing statement: if the graphs of the equations of a linear system have the same slope, then the linear system has no solution
Click here to see answer by Edwin McCravy(8912)

Question 551163: (1)/(3)y=(1)/(3)x+(5)/(3)
x-3y=5
Click here to see answer by Alan3354(30993)

Question 551293: If the temperature on a Celsius scale is multiplied by three and added to two times the reading on a Fahrenheit scale, the result is 460. Five times the Celsius reading plus four times the Fahrenheit reading is equal to 860. Find the temperature on each scale. Please help me!!!!!
Click here to see answer by bucky(2189)

Question 551330: 4x+y=21
-2y+6y=9
Click here to see answer by Alan3354(30993)

Question 551325: 5x+4y=83
3x-3y=-12
Click here to see answer by Alan3354(30993)

Question 551553: 2x+3y=9
3x+4y=5
Click here to see answer by mananth(12270)

Question 551608: x+2y=23
5x+10y=55
Click here to see answer by mananth(12270)

Question 551733: I am trying to graph a problem. My book does not give clear directions how to do it on my calculator (which I am supposed to do). The problem is: y=x^3 - 3x^2 + x-5 I would like to know how to do this on the calculator. Thank you.
Click here to see answer by Alan3354(30993)

Question 551760: Question: Find the slope and y-intercept of the line given by 2x+3y=5. I don't know how to work this. Is it possible to do on a TI-83 calculator? If so, how?
Answer: Slope=_________ y-intercept=____________
Click here to see answer by Alan3354(30993)

Question 551777: Solve the following system of equations using either the substitution or a
ddition method.
2x-y=-2
3x + y=7
I have tried and tried on this one and can't figure it out. My book does not give me any help.
Click here to see answer by Alan3354(30993)

Question 551780: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.
Click here to see answer by richard1234(5390)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by nyc_function(2733)

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