72+b+9+2b=180

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Solution for 72+b+9+2b=180 equation: 



72+b+9+2b=180

We move all terms to the left:

72+b+9+2b-(180)=0

We add all the numbers together, and all the variables

3b-99=0

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

3b=99

b=99/3

b=33

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