(-18)+b=21

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Solution for (-18)+b=21 equation:



(-18)+b=21
We move all terms to the left:
(-18)+b-(21)=0
determiningTheFunctionDomain b-21+(-18)=0
We add all the numbers together, and all the variables
b-39=0
We move all terms containing b to the left, all other terms to the right
b=39

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