Y = - 2x + 2, y + 4x = 0

Set your second equation equal to y so y=-4x+0. Now that you have both equations = y then you can set both equations = to each other.

-2x+2=-4x+0

Now move all your variables to one side and all you constants to one side. You will end up with 2x = (-2) so you will solve for x.

After you solve for x then you can replace the x on both equations above to find y.