2b+2b+2b-b=15

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Solution for 2b+2b+2b-b=15 equation: 



2b+2b+2b-b=15

We move all terms to the left:

2b+2b+2b-b-(15)=0

We add all the numbers together, and all the variables

5b-15=0

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

5b=15

b=15/5

b=3

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