71=-8b-9

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Solution for 71=-8b-9 equation: 



71=-8b-9

We move all terms to the left:

71-(-8b-9)=0

We get rid of parentheses

8b+9+71=0

We add all the numbers together, and all the variables

8b+80=0

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

8b=-80

b=-80/8

b=-10

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