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 add all the numbers together, and all the variables

21/x+7=0

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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