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50n-43=52n-81
We move all terms to the left:
50n-43-(52n-81)=0
We get rid of parentheses
50n-52n+81-43=0
We add all the numbers together, and all the variables
-2n+38=0
We move all terms containing n to the left, all other terms to the right
-2n=-38
n=-38/-2
n=+19
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