21/k=7

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Solution for 21/k=7 equation: 



21/k=7

We move all terms to the left:

21/k-(7)=0



Domain of the equation: k!=0

k∈R



We multiply all the terms by the denominator


-7*k+21=0

We add all the numbers together, and all the variables

-7k+21=0

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

-7k=-21

k=-21/-7

k=+3

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