Chasity started biking to the bookstore traveling 9 mph, after some time the bike got a flat so Chasity walked the rest of the way, traveling 2 mph. If the total trip to the bookstore took 9 hours and it was 39 miles away, how long did Chasity travel at each speed?
+37146 'x' miles at 9 m/hr + 39-x miles at 2 m/hr = 9 hours
x / 9 + (39-x)/2 = 9
2x + 9(39 - x) = 9 (9)(2)
2x + 351- 9x = 162
- 7x = -189
x = 27 27 miles by bike = 3 hours 12 miles by foot = 6 hours
