3b-20=7

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Solution for 3b-20=7 equation: 



3b-20=7

We move all terms to the left:

3b-20-(7)=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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