text: i need help with another hard math problem..........? jamie ran two laps around a track in 99 s. how long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s? x=time to run at 8.5 m/s 99-x=time to run at 8.0 m/s 1st lap length = 8.5x 2nd lap length= 8(99-x)  since the length are the same 8.5x=8(99-x) 8.5x=792-8x     add 8x to both sides +8x        +8x 16.5x=792         divide by 16.5 on both sides x=48 99-x=51  he runs the first lap in 48 sec, and the second lap in 51 sec