12b-5=8b+7

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Solution for 12b-5=8b+7 equation: 



12b-5=8b+7

We move all terms to the left:

12b-5-(8b+7)=0

We get rid of parentheses

12b-8b-7-5=0

We add all the numbers together, and all the variables

4b-12=0

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

4b=12

b=12/4

b=3

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