Answer:
The solution (x, y) = (-5, 3)
Step-by-step explanation:
-x - 8 = -y .... (1)
9y - 12 + 3x = 0 .... (2)
from equation (1)
-x = - y + 8 ... (3)
multiply equation (3) by -1
x = y - 8 ..... (4)
substituting equation (4) in equation (2)
9y - 12 + 3 ( y - 8) = 0
9y - 12 + 3y - 24 = 0
12y - 36 = 0
12y = 36
y = 36 /12
y = 3
Substitute y = 3 in equation (4)
x = y - 8
x = 3 - 8
x = -5
