B=20-3a

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Solution for B=20-3a equation: 



=20-3B

We move all terms to the left:

-(20-3B)=0

We add all the numbers together, and all the variables

-(-3B+20)=0

We get rid of parentheses

3B-20=0

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

3B=20

B=20/3

B=6+2/3

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