Answer:3.5x-12
Explanation:
the terms are 3x, -12, and 0.5x
so combine like terms first
3x+0.5x= 3.5x
so now we put that the combined term where the closest to the left old term was (in this case 3x)
so now we have 3.5x-12
That can't be simplified anymore so that's the answer.