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To solve the equation, we need to isolate the variable x.
Adding 6x to both sides of the equation:
6x + 12 + 6x = 4x - 18 + 6x
12x + 12 = 10x - 18
Subtracting 10x from both sides of the equation:
12x + 12 - 10x = 10x - 18 - 10x
2x + 12 = -18
Subtracting 12 from both sides of the equation:
2x + 12 - 12 = -18 - 12
2x = -30
Dividing both sides of the equation by 2:
(2x)/2 = -30/2
x = -15
Therefore, the solution to the equation is x = -15.