21/p=7

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Solution for 21/p=7 equation: 



21/p=7

We move all terms to the left:

21/p-(7)=0



Domain of the equation: p!=0

p∈R



We multiply all the terms by the denominator


-7*p+21=0

We add all the numbers together, and all the variables

-7p+21=0

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

-7p=-21

p=-21/-7

p=+3

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