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3/4n+9=1/4n+21
We move all terms to the left:
3/4n+9-(1/4n+21)=0
Domain of the equation: 4n!=0
n!=0/4
n!=0
n∈R
Domain of the equation: 4n+21)!=0We get rid of parentheses
n∈R
3/4n-1/4n-21+9=0
We multiply all the terms by the denominator
-21*4n+9*4n+3-1=0
We add all the numbers together, and all the variables
-21*4n+9*4n+2=0
Wy multiply elements
-84n+36n+2=0
We add all the numbers together, and all the variables
-48n+2=0
We move all terms containing n to the left, all other terms to the right
-48n=-2
n=-2/-48
n=1/24
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