7b=9+10b

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Solution for 7b=9+10b equation: 



7b=9+10b

We move all terms to the left:

7b-(9+10b)=0

We add all the numbers together, and all the variables

7b-(10b+9)=0

We get rid of parentheses

7b-10b-9=0

We add all the numbers together, and all the variables

-3b-9=0

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

-3b=9

b=9/-3

b=-3

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