531=(b*6)+21

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Solution for 531=(b*6)+21 equation: 



531=(b*6)+21

We move all terms to the left:

531-((b*6)+21)=0

We add all the numbers together, and all the variables

-((+b*6)+21)+531=0



We calculate terms in parentheses: -((+b*6)+21), so:

(+b*6)+21

We get rid of parentheses

b*6+21

Wy multiply elements

6b+21

Back to the equation:

-(6b+21)



We get rid of parentheses

-6b-21+531=0

We add all the numbers together, and all the variables

-6b+510=0

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

-6b=-510

b=-510/-6

b=+85

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