7(3b-4)=20

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Solution for 7(3b-4)=20 equation: 



7(3b-4)=20

We move all terms to the left:

7(3b-4)-(20)=0

We multiply parentheses

21b-28-20=0

We add all the numbers together, and all the variables

21b-48=0

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

21b=48

b=48/21

b=2+2/7

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