Solve using elimination.

3x + 9y = - 15

-5x - 9y = - 5

(x, y) = (10, - 5)

Step-by-step explanation:

3x + 9y = - 15 (eq 1)

-5x - 9y = - 5 (eq 2)

add equation 1 and 2

3x + 9y - 5x - 9y = - 15 - 5

-2x = - 20

x = 10

put value of x in equation 1

3 (10) + 9y = -15

30 + 9y = - 15

9y = - 45

y = - 5