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(2n-5)-n=125
We move all terms to the left:
(2n-5)-n-(125)=0
We add all the numbers together, and all the variables
-1n+(2n-5)-125=0
We get rid of parentheses
-1n+2n-5-125=0
We add all the numbers together, and all the variables
n-130=0
We move all terms containing n to the left, all other terms to the right
n=130
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