Question

Solve the following system of equations:

−2x + y = 1
−4x + y = −1

Answer 1

subtract the two and you get
2x=2
x=1
plug this into the other two equations and get
y=3
so the solution is
(1,3)

Answer 2

Multiply the top equation by 2. This yields -4x + 2y = 2. Subtract the second equation from this one to solve for y. Then plug in y to solve for x.

Answer 3

subtract the 2 equns. :

2x = 2
x = 1
and y = 1 + 2(1) = 3

Answer 4

y=1+2x
-4x+1+2x=-1
-2x=-2
x=1

y=1+2x
so y=3

Answer 5

(1,3)

Answer 6

thanks guys :)