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4n+3(2n-5)=31
We move all terms to the left:
4n+3(2n-5)-(31)=0
We multiply parentheses
4n+6n-15-31=0
We add all the numbers together, and all the variables
10n-46=0
We move all terms containing n to the left, all other terms to the right
10n=46
n=46/10
n=4+3/5
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