3=b/7

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Solution for 3=b/7 equation: 



3=b/7

We move all terms to the left:

3-(b/7)=0

We add all the numbers together, and all the variables

-(+b/7)+3=0

We get rid of parentheses

-b/7+3=0

We multiply all the terms by the denominator


-b+3*7=0

We add all the numbers together, and all the variables

-1b+21=0

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

-b=-21

b=-21/-1

b=+21

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