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-7x=7(6x-7)
We move all terms to the left:
-7x-(7(6x-7))=0
We calculate terms in parentheses: -(7(6x-7)), so:We get rid of parentheses
7(6x-7)
We multiply parentheses
42x-49
Back to the equation:
-(42x-49)
-7x-42x+49=0
We add all the numbers together, and all the variables
-49x+49=0
We move all terms containing x to the left, all other terms to the right
-49x=-49
x=-49/-49
x=1
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