12b-15=8b+42

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Solution for 12b-15=8b+42 equation: 



12b-15=8b+42

We move all terms to the left:

12b-15-(8b+42)=0

We get rid of parentheses

12b-8b-42-15=0

We add all the numbers together, and all the variables

4b-57=0

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

4b=57

b=57/4

b=14+1/4

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