0=a^+2a+9

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Solution for 0=a^+2a+9 equation: 



0=a^+2a+9

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-a^-2a-9=0

We add all the numbers together, and all the variables

-3a-9=0

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

-3a=9

a=9/-3

a=-3

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