Question

Solve the system by elimination.

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

Answer 1

4-2x=y
5+2x=2y -> 5/2= 2.5 -> 2/2 =1 -> 2/2 =1
2.5+x=y

Answer 2

Below

Explanation:

2x+y=4

-2x+2y=5 If you add these two equations, 'x' will be 'eliminated'

3y = 9 then y = 3 2x + y =4 shows x = 1/2