-21=b/7

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Solution for -21=b/7 equation: 



-21=b/7

We move all terms to the left:

-21-(b/7)=0

We add all the numbers together, and all the variables

-(+b/7)-21=0

We get rid of parentheses

-b/7-21=0

We multiply all the terms by the denominator


-b-21*7=0

We add all the numbers together, and all the variables

-1b-147=0

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

-b=147

b=147/-1

b=-147

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