A car going 7 m/s is given a 42 m head start on another car that goes 13 m/s. How many meters will the slower car go until the faster car catches up?
7 t = d
13 t = d+42
so
6 t = 42
t = 7
7 t = d = 49
13 t = d+42
so
6 t = 42
t = 7
7 t = d = 49