12b+9=45

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Solution for 12b+9=45 equation: 



12b+9=45

We move all terms to the left:

12b+9-(45)=0

We add all the numbers together, and all the variables

12b-36=0

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

12b=36

b=36/12

b=3

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