solve using the substitution method.

Question

-8x + y = 18

9x + 13y = 8

Answer 1

-8x + y = 18
9x + 13y = 8

y = 18 + 8x

9x + 13(18 + 8x) = 8

9x + 104x + 234 = 8

113x = -226

x = - 2

Now solve for y.