3b+91=7b-1

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Solution for 3b+91=7b-1 equation: 



3b+91=7b-1

We move all terms to the left:

3b+91-(7b-1)=0

We get rid of parentheses

3b-7b+1+91=0

We add all the numbers together, and all the variables

-4b+92=0

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

-4b=-92

b=-92/-4

b=+23

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