-9/x=21

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Solution for -9/x=21 equation: 



-9/x=21

We move all terms to the left:

-9/x-(21)=0



Domain of the equation: x!=0

x∈R



We multiply all the terms by the denominator


-21*x-9=0

We add all the numbers together, and all the variables

-21x-9=0

We move all terms containing x to the left, all other terms to the right

-21x=9

x=9/-21

x=-3/7

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