Respuesta :

sqdancefan

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Answer:

  x = (rs -t)/(3r)

Step-by-step explanation:

  [tex]s=3x+\dfrac{t}{r}\\\\s-\dfrac{t}{r}=3x\\\\\dfrac{rs-t}{3r}=x\\\\\boxed{x=\dfrac{rs-t}{3r}}[/tex]