# Canine Agility Course

Algebra Level 1

My aunt and uncle have a Labrador Retriever named Tessa. Tessa is practicing with a basic agility course set up in the backyard.

She clears obstacle $$\alpha$$ in 10.1 seconds, and then passes obstacle $$\beta$$ in 6.5 seconds.

She passes obstacle $$\gamma$$ and $$\theta$$ in the same amount of time, passes obstacle $$\chi$$ in 8.3 seconds, and finishes the course.

If the total course took exactly 30.0 seconds to pass, what is $$\chi-\theta$$ ?

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