21/7=x/3

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Solution for 21/7=x/3 equation: 



21/7=x/3

We move all terms to the left:

21/7-(x/3)=0

We add all the numbers together, and all the variables

-(+x/3)+21/7=0

We add all the numbers together, and all the variables

-(+x/3)+3=0

We get rid of parentheses

-x/3+3=0

We multiply all the terms by the denominator


-x+3*3=0

We add all the numbers together, and all the variables

-1x+9=0

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

-x=-9

x=-9/-1

x=+9

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