3b-21=-48

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Solution for 3b-21=-48 equation: 



3b-21=-48

We move all terms to the left:

3b-21-(-48)=0

We add all the numbers together, and all the variables

3b+27=0

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

3b=-27

b=-27/3

b=-9

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