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10n-7=2(5n+4)-15
We move all terms to the left:
10n-7-(2(5n+4)-15)=0
We calculate terms in parentheses: -(2(5n+4)-15), so:We get rid of parentheses
2(5n+4)-15
We multiply parentheses
10n+8-15
We add all the numbers together, and all the variables
10n-7
Back to the equation:
-(10n-7)
10n-10n+7-7=0
We add all the numbers together, and all the variables
=0
n=0/1
n=0
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