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12+18=4+5n
We move all terms to the left:
12+18-(4+5n)=0
We add all the numbers together, and all the variables
-(5n+4)+12+18=0
We add all the numbers together, and all the variables
-(5n+4)+30=0
We get rid of parentheses
-5n-4+30=0
We add all the numbers together, and all the variables
-5n+26=0
We move all terms containing n to the left, all other terms to the right
-5n=-26
n=-26/-5
n=5+1/5
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