5b-12=9

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Solution for 5b-12=9 equation: 



5b-12=9

We move all terms to the left:

5b-12-(9)=0

We add all the numbers together, and all the variables

5b-21=0

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

5b=21

b=21/5

b=4+1/5

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