-21/x=7

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Solution for -21/x=7 equation: 



-21/x=7

We move all terms to the left:

-21/x-(7)=0



Domain of the equation: x!=0

x∈R



We multiply all the terms by the denominator


-7*x-21=0

We add all the numbers together, and all the variables

-7x-21=0

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

-7x=21

x=21/-7

x=-3

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