b-15+3b+2b+45=180

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Solution for b-15+3b+2b+45=180 equation: 



b-15+3b+2b+45=180

We move all terms to the left:

b-15+3b+2b+45-(180)=0

We add all the numbers together, and all the variables

6b-150=0

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

6b=150

b=150/6

b=25

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