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-(n-3)-4(2n+1)=56
We move all terms to the left:
-(n-3)-4(2n+1)-(56)=0
We multiply parentheses
-(n-3)-8n-4-56=0
We get rid of parentheses
-n-8n+3-4-56=0
We add all the numbers together, and all the variables
-9n-57=0
We move all terms containing n to the left, all other terms to the right
-9n=57
n=57/-9
n=-6+1/3
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