31.9=2.9b

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Solution for 31.9=2.9b equation: 



31.9=2.9b

We move all terms to the left:

31.9-(2.9b)=0

We add all the numbers together, and all the variables

-(+2.9b)+31.9=0

We get rid of parentheses

-2.9b+31.9=0

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

-2.9b=-31.9

b=-31.9/-2.9

b=+11

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