Answer:
x = -2, y = -(10/7)
Explanation:
-3x + 3 = 9 ---------- equation 1
12x - 7y = -14 --------equation 2
from equation 1
-3x + 3 = 9
collect like terms
-3x = 9 - 3
-3x = 6
dividing both sides by -3
x = -2
substitute x = -2 into equation 2
12x - 7y = -14
12(-2) - 7y = -14
-24 - 7y = -14
collect like terms
-7y = -14 + 24
-7y = 10
divide both sides by -7
y = -(10/7)
therefore x = -2, and y = -(10/7)