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7x-42=(x-6)
We move all terms to the left:
7x-42-((x-6))=0
We calculate terms in parentheses: -((x-6)), so:We get rid of parentheses
(x-6)
We get rid of parentheses
x-6
Back to the equation:
-(x-6)
7x-x+6-42=0
We add all the numbers together, and all the variables
6x-36=0
We move all terms containing x to the left, all other terms to the right
6x=36
x=36/6
x=6
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