-(9-2a)=11

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Solution for -(9-2a)=11 equation: 



-(9-2a)=11

We move all terms to the left:

-(9-2a)-(11)=0

We add all the numbers together, and all the variables

-(-2a+9)-11=0

We get rid of parentheses

2a-9-11=0

We add all the numbers together, and all the variables

2a-20=0

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

2a=20

a=20/2

a=10

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