3b+4b+5b=30

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Solution for 3b+4b+5b=30 equation: 



3b+4b+5b=30

We move all terms to the left:

3b+4b+5b-(30)=0

We add all the numbers together, and all the variables

12b-30=0

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

12b=30

b=30/12

b=2+1/2

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