(21)=47+b

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Solution for (21)=47+b equation: 



(21)=47+b

We move all terms to the left:

(21)-(47+b)=0

We add all the numbers together, and all the variables

-(b+47)+21=0

We get rid of parentheses

-b-47+21=0

We add all the numbers together, and all the variables

-1b-26=0

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

-b=26

b=26/-1

b=-26

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