9a+6.5a=-28.5

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Solution for 9a+6.5a=-28.5 equation: 



9a+6.5a=-28.5

We move all terms to the left:

9a+6.5a-(-28.5)=0

We add all the numbers together, and all the variables

15.5a+28.5=0

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

15.5a=-28.5

a=-28.5/15.5

a=-1+13/15.5

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