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9/x+21=4/12
We move all terms to the left:
9/x+21-(4/12)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
9/x+21-(+4/12)=0
We get rid of parentheses
9/x+21-4/12=0
We calculate fractions
There is no solution for this equation
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