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24-2n=12+15=30
We move all terms to the left:
24-2n-(12+15)=0
We add all the numbers together, and all the variables
-2n+24-27=0
We add all the numbers together, and all the variables
-2n-3=0
We move all terms containing n to the left, all other terms to the right
-2n=3
n=3/-2
n=-1+1/2
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