Question

Can you tell me how to solve this problem using substitution step by step?

y = -2x - 9 and 6x - 5y = - 19

Answer 1

x = -4

Explanation:

The first equation tells us what y is equal to. We then substitute wherever there is a y with what y equals.

y = -2x - 9

6x - 5y = -19

6x - 5(-2x-9) = -19

6x + 10x + 45 = -19

16x + 45 = -19

16x = -64

x = -4