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-12x-x=8-3x
We move all terms to the left:
-12x-x-(8-3x)=0
We add all the numbers together, and all the variables
-12x-x-(-3x+8)=0
We add all the numbers together, and all the variables
-13x-(-3x+8)=0
We get rid of parentheses
-13x+3x-8=0
We add all the numbers together, and all the variables
-10x-8=0
We move all terms containing x to the left, all other terms to the right
-10x=8
x=8/-10
x=-4/5
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