a+8.9=-12.9

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Solution for a+8.9=-12.9 equation: 



a+8.9=-12.9

We move all terms to the left:

a+8.9-(-12.9)=0

We add all the numbers together, and all the variables

a+21.8=0

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

a=-21.8

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