Question

-27=-9x-18y
-5y-10x-15=0

Answer 1

x=-3

y=3

Explanation:

-27=-9x-18y equation 1

-5y-10x-15=0 equation 2

using equation 2 we have:

-10x -15 =5y

y= -2x -3 equation 3

using equation 3 in equation 1 we have:

-27=-9x-18(-2x -3)

-27= -9x +36x +54

-27-54 =27x

-81 = 27x

so we have:

x= -81/27

x=-3

y= -2(-3) -3

y= 6-3

y = 3