Question

Again. -.-

4x-y=2
5x-2y=-2

Answer 1

y = 4x -2

5x -2(4x - 2) = -2

5x +4 - 8x = -2

-3x = -6

x = 2

Answer 2

y = 4x -2

y = 4(2) -2

y = 8 -2

y = 6

Answer 3

4x-y=2 [1]
5x-2y=-2 [2] make y the subject in equation [1]

y = 2-4x substitute into [2]
5x-2(2-4x )=-2 expand
5x-4+8x =-2
13x -4 = -2
13x = 2
x = 2/13

Subsstitute for x in [1]

8/13-y=2

y = -18/13

Answer 4

You forgot that there is a negative sign in y.

Answer 5

What? His answer is wrong. Why the medal? :( Look at my solution.