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64=4x+7x-8+x
We move all terms to the left:
64-(4x+7x-8+x)=0
We add all the numbers together, and all the variables
-(12x-8)+64=0
We get rid of parentheses
-12x+8+64=0
We add all the numbers together, and all the variables
-12x+72=0
We move all terms containing x to the left, all other terms to the right
-12x=-72
x=-72/-12
x=+6
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