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2+3n+2(2+3n)+3(2+3n)=102
We move all terms to the left:
2+3n+2(2+3n)+3(2+3n)-(102)=0
We add all the numbers together, and all the variables
3n+2(3n+2)+3(3n+2)+2-102=0
We add all the numbers together, and all the variables
3n+2(3n+2)+3(3n+2)-100=0
We multiply parentheses
3n+6n+9n+4+6-100=0
We add all the numbers together, and all the variables
18n-90=0
We move all terms containing n to the left, all other terms to the right
18n=90
n=90/18
n=5
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