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2(n+4)+6n=40
We move all terms to the left:
2(n+4)+6n-(40)=0
We add all the numbers together, and all the variables
6n+2(n+4)-40=0
We multiply parentheses
6n+2n+8-40=0
We add all the numbers together, and all the variables
8n-32=0
We move all terms containing n to the left, all other terms to the right
8n=32
n=32/8
n=4
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