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8-(4n-7)=8-5n
We move all terms to the left:
8-(4n-7)-(8-5n)=0
We add all the numbers together, and all the variables
-(4n-7)-(-5n+8)+8=0
We get rid of parentheses
-4n+5n+7-8+8=0
We add all the numbers together, and all the variables
n+7=0
We move all terms containing n to the left, all other terms to the right
n=-7
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