Answer:
y = -5
x = 5
Step-by-step explanation:
3x + 6y = -15
-6x - 4y = -10
multiply first equation with 2 then add two equations up
×2 / 3x + 6y = -15 ➡ 6x + 12y = -30
(6x + 12y) + (-6x - 4y) = (-10) +(-30) (6x will eliminate -6x)
8y = -40
y = -5
use the value of y in the first equation to find x
3x + 6 ×(-5) = -15 ➡ 3x -30 = -15 ➡ 3x = 15
