Step-by-step explanation:
Given that,
x=4y - 12 ....(1)
And
-2y= x- 6 ....(2)
Put equation (1) in equation (2). So,
-2y= (4y - 12)- 6
-2y = 4y - 12 -6
-2y-4y = -12-6
-6y = -18
y = 3
So, substituting x=4y - 12 into the equation -2y= x- 6 will produce y = 3.
