8b=12.3-b=8.1+7b+4.2

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Solution for 8b=12.3-b=8.1+7b+4.2 equation: 



8b=12.3-b=8.1+7b+4.2

We move all terms to the left:

8b-(12.3-b)=0

We add all the numbers together, and all the variables

8b-(-1b+12.3)=0

We get rid of parentheses

8b+1b-12.3=0

We add all the numbers together, and all the variables

9b-12.3=0

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

9b=12.3

b=12.3/9

b=1+1/2.7272727272727

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