21=c/3

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Solution for 21=c/3 equation: 



21=c/3

We move all terms to the left:

21-(c/3)=0

We add all the numbers together, and all the variables

-(+c/3)+21=0

We get rid of parentheses

-c/3+21=0

We multiply all the terms by the denominator


-c+21*3=0

We add all the numbers together, and all the variables

-1c+63=0

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

-c=-63

c=-63/-1

c=+63

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