12b-42=7b+18

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Solution for 12b-42=7b+18 equation: 



12b-42=7b+18

We move all terms to the left:

12b-42-(7b+18)=0

We get rid of parentheses

12b-7b-18-42=0

We add all the numbers together, and all the variables

5b-60=0

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

5b=60

b=60/5

b=12

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