3(2b+5)=21

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Solution for 3(2b+5)=21 equation: 



3(2b+5)=21

We move all terms to the left:

3(2b+5)-(21)=0

We multiply parentheses

6b+15-21=0

We add all the numbers together, and all the variables

6b-6=0

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

6b=6

b=6/6

b=1

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