3b-30-7b=2b-18

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Solution for 3b-30-7b=2b-18 equation: 



3b-30-7b=2b-18

We move all terms to the left:

3b-30-7b-(2b-18)=0

We add all the numbers together, and all the variables

-4b-(2b-18)-30=0

We get rid of parentheses

-4b-2b+18-30=0

We add all the numbers together, and all the variables

-6b-12=0

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

-6b=12

b=12/-6

b=-2

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