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-130-3x=-12x+5
We move all terms to the left:
-130-3x-(-12x+5)=0
We get rid of parentheses
-3x+12x-5-130=0
We add all the numbers together, and all the variables
9x-135=0
We move all terms containing x to the left, all other terms to the right
9x=135
x=135/9
x=15
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