Posted by **Kristina** on Friday, October 2, 2009 at 4:55pm.

A golfer rides in a golf cart at an average speed of 3.10 m/s for 21.0 s. She then gets out of the cart and starts walking at an average speed of 1.60 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 2.10 m/s?

I need help solving for T. I don't understand how to do it since there is a T on both sides of the problem

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