8+9b=4b-7

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Solution for 8+9b=4b-7 equation: 



8+9b=4b-7

We move all terms to the left:

8+9b-(4b-7)=0

We get rid of parentheses

9b-4b+7+8=0

We add all the numbers together, and all the variables

5b+15=0

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

5b=-15

b=-15/5

b=-3

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