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-3(n+5)5=12
We move all terms to the left:
-3(n+5)5-(12)=0
We multiply parentheses
-15n-75-12=0
We add all the numbers together, and all the variables
-15n-87=0
We move all terms containing n to the left, all other terms to the right
-15n=87
n=87/-15
n=-5+4/5
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