B+-1(7-b)=21

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Solution for B+-1(7-b)=21 equation: 



+-1(7-B)=21

We move all terms to the left:

+-1(7-B)-(21)=0

determiningTheFunctionDomain
-1(7-B)-21+=0

We add all the numbers together, and all the variables

-1(-1B+7)-21+=0

We add all the numbers together, and all the variables

-1(-1B+7)=0

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