9+0.8b=0.9b

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Solution for 9+0.8b=0.9b equation: 



9+0.8b=0.9b

We move all terms to the left:

9+0.8b-(0.9b)=0

We add all the numbers together, and all the variables

0.8b-(+0.9b)+9=0

We get rid of parentheses

0.8b-0.9b+9=0

We add all the numbers together, and all the variables

-0.1b+9=0

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

-0.1b=-9

b=-9/-0.1

b=+90

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