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7(2n+4)=9(9n+1)+7
We move all terms to the left:
7(2n+4)-(9(9n+1)+7)=0
We multiply parentheses
14n-(9(9n+1)+7)+28=0
We calculate terms in parentheses: -(9(9n+1)+7), so:We get rid of parentheses
9(9n+1)+7
We multiply parentheses
81n+9+7
We add all the numbers together, and all the variables
81n+16
Back to the equation:
-(81n+16)
14n-81n-16+28=0
We add all the numbers together, and all the variables
-67n+12=0
We move all terms containing n to the left, all other terms to the right
-67n=-12
n=-12/-67
n=12/67
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