-4-7b-8b=-16b-13

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Solution for -4-7b-8b=-16b-13 equation: 



-4-7b-8b=-16b-13

We move all terms to the left:

-4-7b-8b-(-16b-13)=0

We add all the numbers together, and all the variables

-15b-(-16b-13)-4=0

We get rid of parentheses

-15b+16b+13-4=0

We add all the numbers together, and all the variables

b+9=0

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

b=-9

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