21+19b=42b+12

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Solution for 21+19b=42b+12 equation: 



21+19b=42b+12

We move all terms to the left:

21+19b-(42b+12)=0

We get rid of parentheses

19b-42b-12+21=0

We add all the numbers together, and all the variables

-23b+9=0

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

-23b=-9

b=-9/-23

b=9/23

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