2b-9=4b+9

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Solution for 2b-9=4b+9 equation: 



2b-9=4b+9

We move all terms to the left:

2b-9-(4b+9)=0

We get rid of parentheses

2b-4b-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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