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522=9(-7x+12)
We move all terms to the left:
522-(9(-7x+12))=0
We calculate terms in parentheses: -(9(-7x+12)), so:We get rid of parentheses
9(-7x+12)
We multiply parentheses
-63x+108
Back to the equation:
-(-63x+108)
63x-108+522=0
We add all the numbers together, and all the variables
63x+414=0
We move all terms containing x to the left, all other terms to the right
63x=-414
x=-414/63
x=-6+4/7
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