6b-12=21-5b

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Solution for 6b-12=21-5b equation: 



6b-12=21-5b

We move all terms to the left:

6b-12-(21-5b)=0

We add all the numbers together, and all the variables

6b-(-5b+21)-12=0

We get rid of parentheses

6b+5b-21-12=0

We add all the numbers together, and all the variables

11b-33=0

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

11b=33

b=33/11

b=3

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