13-s=8.5

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Solution for 13-s=8.5 equation: 



13-s=8.5

We move all terms to the left:

13-s-(8.5)=0

We add all the numbers together, and all the variables

-1s+4.5=0

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

-s=-4.5

s=-4.5/-1

s=4+0.5/1

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