9(a+11)=-11(a-9)

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Solution for 9(a+11)=-11(a-9) equation: 



9(a+11)=-11(a-9)

We move all terms to the left:

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

We multiply parentheses

9a-(-11(a-9))+99=0



We calculate terms in parentheses: -(-11(a-9)), so:

-11(a-9)

We multiply parentheses

-11a+99

Back to the equation:

-(-11a+99)



We get rid of parentheses

9a+11a-99+99=0

We add all the numbers together, and all the variables

20a=0

a=0/20

a=0

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