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8-9x=15(15+7)+3x
We move all terms to the left:
8-9x-(15(15+7)+3x)=0
We add all the numbers together, and all the variables
-9x-(1522+3x)+8=0
We get rid of parentheses
-9x-3x-1522+8=0
We add all the numbers together, and all the variables
-12x-1514=0
We move all terms containing x to the left, all other terms to the right
-12x=1514
x=1514/-12
x=-126+1/6
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