Question

2x +5y = -7
7x + y = -8
Solve by substitution SHOW WORK!

Answer 1

x = 1, y = -15

Explanation:

7x + y = -8 ⇒ y = -7x-8

2x + 5y = -7

substitute -7x-8 for y:

2x + 5(-7x-8) = -7

2x - 35x - 40 = -7

-33x - 40 = -7

-33x = -33

x = 1

y = -7x-8 = -15