(-a+2)+9=11

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



(-a+2)+9=11

We move all terms to the left:

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

We add all the numbers together, and all the variables

(-1a+2)+9-11=0

We add all the numbers together, and all the variables

(-1a+2)-2=0

We get rid of parentheses

-1a+2-2=0

We add all the numbers together, and all the variables

-a=0

a=0/-1

a=0

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