7b+7b+1-7=15

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Solution for 7b+7b+1-7=15 equation: 



7b+7b+1-7=15

We move all terms to the left:

7b+7b+1-7-(15)=0

We add all the numbers together, and all the variables

14b-21=0

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

14b=21

b=21/14

b=1+1/2

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