5b-9+7b=10b+9

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Solution for 5b-9+7b=10b+9 equation: 



5b-9+7b=10b+9

We move all terms to the left:

5b-9+7b-(10b+9)=0

We add all the numbers together, and all the variables

12b-(10b+9)-9=0

We get rid of parentheses

12b-10b-9-9=0

We add all the numbers together, and all the variables

2b-18=0

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

2b=18

b=18/2

b=9

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