8b-7=9b-15

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Solution for 8b-7=9b-15 equation: 



8b-7=9b-15

We move all terms to the left:

8b-7-(9b-15)=0

We get rid of parentheses

8b-9b+15-7=0

We add all the numbers together, and all the variables

-1b+8=0

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

-b=-8

b=-8/-1

b=+8

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