using substitution to solve

Question

-3x+y= -17
2x-3y=23

Answer 1

y = (3 x - 17)
so
2 x - 3(3x-17) = 23

2x - 9 x + 51 = 23

7 x = 28

x = 4

so y = (3 x - 17) = 12-17 = -5