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21/3=63/n
We move all terms to the left:
21/3-(63/n)=0
Domain of the equation: n)!=0We add all the numbers together, and all the variables
n!=0/1
n!=0
n∈R
-(+63/n)+21/3=0
We add all the numbers together, and all the variables
-(+63/n)+7=0
We get rid of parentheses
-63/n+7=0
We multiply all the terms by the denominator
7*n-63=0
We add all the numbers together, and all the variables
7n-63=0
We move all terms containing n to the left, all other terms to the right
7n=63
n=63/7
n=9
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