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4-12n=-7n+15
We move all terms to the left:
4-12n-(-7n+15)=0
We get rid of parentheses
-12n+7n-15+4=0
We add all the numbers together, and all the variables
-5n-11=0
We move all terms containing n to the left, all other terms to the right
-5n=11
n=11/-5
n=-2+1/5
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