8a+5a=-13

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Solution for 8a+5a=-13 equation: 



8a+5a=-13

We move all terms to the left:

8a+5a-(-13)=0

We add all the numbers together, and all the variables

13a+13=0

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

13a=-13

a=-13/13

a=-1

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