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88=-2(5-7n)
We move all terms to the left:
88-(-2(5-7n))=0
We add all the numbers together, and all the variables
-(-2(-7n+5))+88=0
We calculate terms in parentheses: -(-2(-7n+5)), so:We get rid of parentheses
-2(-7n+5)
We multiply parentheses
14n-10
Back to the equation:
-(14n-10)
-14n+10+88=0
We add all the numbers together, and all the variables
-14n+98=0
We move all terms containing n to the left, all other terms to the right
-14n=-98
n=-98/-14
n=+7
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