3=21/c

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Solution for 3=21/c equation: 



3=21/c

We move all terms to the left:

3-(21/c)=0



Domain of the equation: c)!=0

c!=0/1

c!=0

c∈R



We add all the numbers together, and all the variables

-(+21/c)+3=0

We get rid of parentheses

-21/c+3=0

We multiply all the terms by the denominator


3*c-21=0

We add all the numbers together, and all the variables

3c-21=0

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

3c=21

c=21/3

c=7

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