Question

Christopher's best time in a race is four seconds faster than his second-best time. His second-best time is 1 1/3 times slower than his best time. Find his best time.

Answer 1

let best time be x and second best time be 7
according to the first condition x - y = 4
according to the second condition y = 3/4 x
now you need to solve the equations.

Answer 2

*the second best time be y (not 7)

Answer 3

hmm, isn't y>x

Answer 4

yes you are right ...
second best time is x and best time is y
so x-y = 4
x = 3/4 y

Answer 5

think its x = 4/3 y