B=7+2a

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Solution for B=7+2a equation: 



=7+2B

We move all terms to the left:

-(7+2B)=0

We add all the numbers together, and all the variables

-(2B+7)=0

We get rid of parentheses

-2B-7=0

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

-2B=7

B=7/-2

B=-3+1/2

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