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56=7(7-x)
We move all terms to the left:
56-(7(7-x))=0
We add all the numbers together, and all the variables
-(7(-1x+7))+56=0
We calculate terms in parentheses: -(7(-1x+7)), so:We get rid of parentheses
7(-1x+7)
We multiply parentheses
-7x+49
Back to the equation:
-(-7x+49)
7x-49+56=0
We add all the numbers together, and all the variables
7x+7=0
We move all terms containing x to the left, all other terms to the right
7x=-7
x=-7/7
x=-1
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