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-12x=8-3x
We move all terms to the left:
-12x-(8-3x)=0
We add all the numbers together, and all the variables
-12x-(-3x+8)=0
We get rid of parentheses
-12x+3x-8=0
We add all the numbers together, and all the variables
-9x-8=0
We move all terms containing x to the left, all other terms to the right
-9x=8
x=8/-9
x=-8/9
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