9a+4a=-23

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Solution for 9a+4a=-23 equation: 



9a+4a=-23

We move all terms to the left:

9a+4a-(-23)=0

We add all the numbers together, and all the variables

13a+23=0

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

13a=-23

a=-23/13

a=-1+10/13

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