7b-4b+9=4b+90-2b

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Solution for 7b-4b+9=4b+90-2b equation: 



7b-4b+9=4b+90-2b

We move all terms to the left:

7b-4b+9-(4b+90-2b)=0

We add all the numbers together, and all the variables

7b-4b-(2b+90)+9=0

We add all the numbers together, and all the variables

3b-(2b+90)+9=0

We get rid of parentheses

3b-2b-90+9=0

We add all the numbers together, and all the variables

b-81=0

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

b=81

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