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2(n+4)+3n-1=57
We move all terms to the left:
2(n+4)+3n-1-(57)=0
We add all the numbers together, and all the variables
3n+2(n+4)-58=0
We multiply parentheses
3n+2n+8-58=0
We add all the numbers together, and all the variables
5n-50=0
We move all terms containing n to the left, all other terms to the right
5n=50
n=50/5
n=10
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