At the beginning of my bike ride I feel good, so I can travel   20 miles per hour.  Later, I get tired and travel only 12 miles  per hour.  If I travel a total of 122 miles in a total time of   8 hours, for how many hours did I feel good?  Express your  answer as a common fraction.
Question:
At the beginning of my bike ride I feel good, so I can travel   20 miles per hour.  Later, I get tired and travel only 12 miles  per hour.  If I travel a total of 122 miles in a total time of   8 hours, for how many hours did I feel good?  Express your  answer as a common fraction.
Answer:
Let's think step by step.

user
\frac{13}{4}
At the beginning of my bike ride I feel good, so I can travel   20 miles per hour.  Later, I get tired and travel only 12 miles  per hour.  If I travel a total of 122 miles in a total time of   8 hours, for how many hours did I feel good?  Express your  answer as a common fraction.
train