10b-17b+(-9b)-20b-(-18b)-(-9)=-9

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Solution for 10b-17b+(-9b)-20b-(-18b)-(-9)=-9 equation: 



10b-17b+(-9b)-20b-(-18b)-(-9)=-9

We move all terms to the left:

10b-17b+(-9b)-20b-(-18b)-(-9)-(-9)=0

We add all the numbers together, and all the variables

-27b+(-9b)-(-18b)+18=0

We get rid of parentheses

-27b-9b+18b+18=0

We add all the numbers together, and all the variables

-18b+18=0

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

-18b=-18

b=-18/-18

b=1

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