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-3=2n-5n
We move all terms to the left:
-3-(2n-5n)=0
We add all the numbers together, and all the variables
-(-3n)-3=0
We get rid of parentheses
3n-3=0
We move all terms containing n to the left, all other terms to the right
3n=3
n=3/3
n=1
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