21-4s=17

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Solution for 21-4s=17 equation: 



21-4s=17

We move all terms to the left:

21-4s-(17)=0

We add all the numbers together, and all the variables

-4s+4=0

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

-4s=-4

s=-4/-4

s=1

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