-a-9=4.5

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Solution for -a-9=4.5 equation: 



-a-9=4.5

We move all terms to the left:

-a-9-(4.5)=0

We add all the numbers together, and all the variables

-1a-13.5=0

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

-a=13.5

a=13.5/-1

a=-13+0.5/1

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