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4+3x=6x-8+3x=-12
We move all terms to the left:
4+3x-(6x-8+3x)=0
We add all the numbers together, and all the variables
3x-(9x-8)+4=0
We get rid of parentheses
3x-9x+8+4=0
We add all the numbers together, and all the variables
-6x+12=0
We move all terms containing x to the left, all other terms to the right
-6x=-12
x=-12/-6
x=+2
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