Question

what is the y-value in the solution?
3x - 5y = -16 and 2x + 5y = 31

Answer 1

it might be simpler to find the x value and work it from that angle since the ys cancel right away

Answer 2

3x - 5y = -16
2x + 5y = 31
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5x = 15

Answer 3

I know, x = 3

Answer 4

then if x = 3

2x + 5y = 31

2(3) + 5y = 31

6 + 5y = 31

5y = 31-6 = 25