-9+4a=11

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Solution for -9+4a=11 equation: 



-9+4a=11

We move all terms to the left:

-9+4a-(11)=0

We add all the numbers together, and all the variables

4a-20=0

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

4a=20

a=20/4

a=5

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