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6n-9n+10n/12=21
We move all terms to the left:
6n-9n+10n/12-(21)=0
We add all the numbers together, and all the variables
-3n+10n/12-21=0
We multiply all the terms by the denominator
-3n*12+10n-21*12=0
We add all the numbers together, and all the variables
10n-3n*12-252=0
Wy multiply elements
10n-36n-252=0
We add all the numbers together, and all the variables
-26n-252=0
We move all terms containing n to the left, all other terms to the right
-26n=252
n=252/-26
n=-9+9/13
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