3b-4=21

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Solution for 3b-4=21 equation: 



3b-4=21

We move all terms to the left:

3b-4-(21)=0

We add all the numbers together, and all the variables

3b-25=0

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

3b=25

b=25/3

b=8+1/3

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