13s-4s=9

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Solution for 13s-4s=9 equation: 



13s-4s=9

We move all terms to the left:

13s-4s-(9)=0

We add all the numbers together, and all the variables

9s-9=0

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

9s=9

s=9/9

s=1

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