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48=3(4+3n)
We move all terms to the left:
48-(3(4+3n))=0
We add all the numbers together, and all the variables
-(3(3n+4))+48=0
We calculate terms in parentheses: -(3(3n+4)), so:We get rid of parentheses
3(3n+4)
We multiply parentheses
9n+12
Back to the equation:
-(9n+12)
-9n-12+48=0
We add all the numbers together, and all the variables
-9n+36=0
We move all terms containing n to the left, all other terms to the right
-9n=-36
n=-36/-9
n=+4
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