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105=7(n+7)
We move all terms to the left:
105-(7(n+7))=0
We calculate terms in parentheses: -(7(n+7)), so:We get rid of parentheses
7(n+7)
We multiply parentheses
7n+49
Back to the equation:
-(7n+49)
-7n-49+105=0
We add all the numbers together, and all the variables
-7n+56=0
We move all terms containing n to the left, all other terms to the right
-7n=-56
n=-56/-7
n=+8
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