-2.5=20.5b

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Solution for -2.5=20.5b equation: 



-2.5=20.5b

We move all terms to the left:

-2.5-(20.5b)=0

We add all the numbers together, and all the variables

-(+20.5b)-2.5=0

We get rid of parentheses

-20.5b-2.5=0

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

-20.5b=2.5

b=2.5/-20.5

b=-1/8.2

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