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1.5x-4.5=-12
We move all terms to the left:
1.5x-4.5-(-12)=0
We add all the numbers together, and all the variables
1.5x+7.5=0
We move all terms containing x to the left, all other terms to the right
1.5x=-7.5
x=-7.5/1.5
x=-5
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