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54+12=100-n
We move all terms to the left:
54+12-(100-n)=0
We add all the numbers together, and all the variables
-(-1n+100)+54+12=0
We add all the numbers together, and all the variables
-(-1n+100)+66=0
We get rid of parentheses
1n-100+66=0
We add all the numbers together, and all the variables
n-34=0
We move all terms containing n to the left, all other terms to the right
n=34
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