9=3-4b

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Solution for 9=3-4b equation: 



9=3-4b

We move all terms to the left:

9-(3-4b)=0

We add all the numbers together, and all the variables

-(-4b+3)+9=0

We get rid of parentheses

4b-3+9=0

We add all the numbers together, and all the variables

4b+6=0

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

4b=-6

b=-6/4

b=-1+1/2

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