9/3=x/21

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Solution for 9/3=x/21 equation: 



9/3=x/21

We move all terms to the left:

9/3-(x/21)=0

We add all the numbers together, and all the variables

-(+x/21)+9/3=0

We add all the numbers together, and all the variables

-(+x/21)+3=0

We get rid of parentheses

-x/21+3=0

We multiply all the terms by the denominator


-x+3*21=0

We add all the numbers together, and all the variables

-1x+63=0

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

-x=-63

x=-63/-1

x=+63

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