Question

2x+y=3
-2x+5y=-9

Answer 1

6y=-6.................(by adding both equations)

Answer 2

Eliminate 2x and -2x.
Add y and 5y, which will give you 6y.
Subtract -9 from 3, which will give you -6.
6y=-6(divide 6 on the both side)
Y value would be -1.