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3(n*5)=13
We move all terms to the left:
3(n*5)-(13)=0
We add all the numbers together, and all the variables
3(+n*5)-13=0
We multiply parentheses
15n-13=0
We move all terms containing n to the left, all other terms to the right
15n=13
n=13/15
n=13/15
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