2b+b-30+b-30=180

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Solution for 2b+b-30+b-30=180 equation: 



2b+b-30+b-30=180

We move all terms to the left:

2b+b-30+b-30-(180)=0

We add all the numbers together, and all the variables

4b-240=0

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

4b=240

b=240/4

b=60

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