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7(2+n)-5n=3(6+3n)+3
We move all terms to the left:
7(2+n)-5n-(3(6+3n)+3)=0
We add all the numbers together, and all the variables
7(n+2)-5n-(3(3n+6)+3)=0
We add all the numbers together, and all the variables
-5n+7(n+2)-(3(3n+6)+3)=0
We multiply parentheses
-5n+7n-(3(3n+6)+3)+14=0
We calculate terms in parentheses: -(3(3n+6)+3), so:We add all the numbers together, and all the variables
3(3n+6)+3
We multiply parentheses
9n+18+3
We add all the numbers together, and all the variables
9n+21
Back to the equation:
-(9n+21)
2n-(9n+21)+14=0
We get rid of parentheses
2n-9n-21+14=0
We add all the numbers together, and all the variables
-7n-7=0
We move all terms containing n to the left, all other terms to the right
-7n=7
n=7/-7
n=-1
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