7-3b=5b+15

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Solution for 7-3b=5b+15 equation: 



7-3b=5b+15

We move all terms to the left:

7-3b-(5b+15)=0

We get rid of parentheses

-3b-5b-15+7=0

We add all the numbers together, and all the variables

-8b-8=0

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

-8b=8

b=8/-8

b=-1

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