Question 1049953
walking data
speed r
time t
distance 3
{{{3=rt}}}

cycling data
speed r+4
time 2-t because total time is 2.

distance 3

{{{3=(r+4)*(2-t)}}}
solve the equations

{{{3=rt}}}
{{{3=(r+4)*(2-t)}}}


*[invoke quadratic "t", 2, 2, -12 ]