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8+n/4=13
We move all terms to the left:
8+n/4-(13)=0
We add all the numbers together, and all the variables
n/4-5=0
We multiply all the terms by the denominator
n-5*4=0
We add all the numbers together, and all the variables
n-20=0
We move all terms containing n to the left, all other terms to the right
n=20
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