(4b-42)=2b

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Solution for (4b-42)=2b equation: 



(4b-42)=2b

We move all terms to the left:

(4b-42)-(2b)=0

We add all the numbers together, and all the variables

-2b+(4b-42)=0

We get rid of parentheses

-2b+4b-42=0

We add all the numbers together, and all the variables

2b-42=0

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

2b=42

b=42/2

b=21

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