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3+5n=5(+2)-7
We move all terms to the left:
3+5n-(5(+2)-7)=0
We add all the numbers together, and all the variables
5n+3-(52-7)=0
We add all the numbers together, and all the variables
5n-42=0
We move all terms containing n to the left, all other terms to the right
5n=42
n=42/5
n=8+2/5
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