4b-42+9b-90=180

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Solution for 4b-42+9b-90=180 equation: 



4b-42+9b-90=180

We move all terms to the left:

4b-42+9b-90-(180)=0

We add all the numbers together, and all the variables

13b-312=0

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

13b=312

b=312/13

b=24

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