Question

Please Help!
Solve the following system of equations:
-2x + y = 1
-4x + y = -1

(3, 1)
(-1, 3)
(-1, -3)
(1, 3)

Answer 1

Were you asked to use any specific method?

Answer 2

subtract them from each other (elimination)

Answer 3

No I was not. @mathstudent55

Answer 4

Go to Mathway.com

Answer 5

I can show you how to solve for one variable, and you will do the other , OK?

Answer 6

-2x + y = 1
-4x + y = -1
------------------- subtracting the 2nd equation from the first
-2x-(-4x) +y-y = 1-(-1)
-2x+4x + 0y = 1+1
-2x=2
x=-1

can you do the y?

Answer 7

Yes I can! Thank you!(:

Answer 8

Anytime, do you get the idea of how to do it in the future?

Answer 9

Yes, Yes I doo.

Answer 10

If not, then you can try elimination.

Multiply the first equation by -1, and add it to the second equation.
That will eliminate the y variable.
Solve for x.
Then use that value of x in one of the original equations to solve for y.