8.1=0.9b

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Solution for 8.1=0.9b equation: 



8.1=0.9b

We move all terms to the left:

8.1-(0.9b)=0

We add all the numbers together, and all the variables

-(+0.9b)+8.1=0

We get rid of parentheses

-0.9b+8.1=0

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

-0.9b=-8.1

b=-8.1/-0.9

b=+9

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