a-9=11-4a

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



a-9=11-4a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

a+4a-11-9=0

We add all the numbers together, and all the variables

5a-20=0

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

5a=20

a=20/5

a=4

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