As part of her training routine for​ basketball, Shaylle alternates between cycling and running for exercise. She cycles at a rate of 16 mph and runs at a rate of 8 mph. If she spends 8.5 hours exercising and covers a total of 112 miles, how much time did she spend on each​ exercise?

1 answer

c+r = 8.5
16c+8r = 112

Now just solve for c and r.