8a+3a-9a=11+9-1

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Solution for 8a+3a-9a=11+9-1 equation: 



8a+3a-9a=11+9-1

We move all terms to the left:

8a+3a-9a-(11+9-1)=0

We add all the numbers together, and all the variables

8a+3a-9a-19=0

We add all the numbers together, and all the variables

2a-19=0

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

2a=19

a=19/2

a=9+1/2

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