9a-11=12a+1

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Solution for 9a-11=12a+1 equation: 



9a-11=12a+1

We move all terms to the left:

9a-11-(12a+1)=0

We get rid of parentheses

9a-12a-1-11=0

We add all the numbers together, and all the variables

-3a-12=0

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

-3a=12

a=12/-3

a=-4

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