Question

Solve the following system of equations:

−2x + y = 1
−4x + y = −1

Answer 1

y=3
x=1

Answer 2

Because: (-2)(-2x+y=1) = 4x-2y=-2. Use this equation and the second equation to cancel out the 4x's. Then you get -y=-3, and then y=3. Then you plug y in to solve for x, and get -2x + (3) = 1. Then -2x=-2, then x=1