-12b-20=-9b-12+1

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Solution for -12b-20=-9b-12+1 equation: 



-12b-20=-9b-12+1

We move all terms to the left:

-12b-20-(-9b-12+1)=0

We add all the numbers together, and all the variables

-12b-(-9b-11)-20=0

We get rid of parentheses

-12b+9b+11-20=0

We add all the numbers together, and all the variables

-3b-9=0

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

-3b=9

b=9/-3

b=-3

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