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n*9=8*13
We move all terms to the left:
n*9-(8*13)=0
We add all the numbers together, and all the variables
n*9-104=0
Wy multiply elements
9n-104=0
We move all terms containing n to the left, all other terms to the right
9n=104
n=104/9
n=11+5/9
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