12(b-1)=30

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Solution for 12(b-1)=30 equation: 



12(b-1)=30

We move all terms to the left:

12(b-1)-(30)=0

We multiply parentheses

12b-12-30=0

We add all the numbers together, and all the variables

12b-42=0

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

12b=42

b=42/12

b=3+1/2

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