3(2x - 2) - 12 + x
First distriubte 3 to both 2x and -2
3(2x) = 6x
3(-2) = -6
6x - 6 - 12 + x
Simplify. Combine like terms
(6x + x) + (- 6 - 12)
7x - 18
7x - 18 is your answer
hope this helps
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