3b-21=-33

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Solution for 3b-21=-33 equation: 



3b-21=-33

We move all terms to the left:

3b-21-(-33)=0

We add all the numbers together, and all the variables

3b+12=0

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

3b=-12

b=-12/3

b=-4

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