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8=7n+13
We move all terms to the left:
8-(7n+13)=0
We get rid of parentheses
-7n-13+8=0
We add all the numbers together, and all the variables
-7n-5=0
We move all terms containing n to the left, all other terms to the right
-7n=5
n=5/-7
n=-5/7
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