-9-11=2a+4

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Solution for -9-11=2a+4 equation: 



-9-11=2a+4

We move all terms to the left:

-9-11-(2a+4)=0

We add all the numbers together, and all the variables

-(2a+4)-20=0

We get rid of parentheses

-2a-4-20=0

We add all the numbers together, and all the variables

-2a-24=0

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

-2a=24

a=24/-2

a=-12

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