2b+5b=42

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Solution for 2b+5b=42 equation: 



2b+5b=42

We move all terms to the left:

2b+5b-(42)=0

We add all the numbers together, and all the variables

7b-42=0

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

7b=42

b=42/7

b=6

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