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4+3(2n-1)=43
We move all terms to the left:
4+3(2n-1)-(43)=0
We add all the numbers together, and all the variables
3(2n-1)-39=0
We multiply parentheses
6n-3-39=0
We add all the numbers together, and all the variables
6n-42=0
We move all terms containing n to the left, all other terms to the right
6n=42
n=42/6
n=7
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