Question 949079
This is easiest handled with variables for time quantities instead of points in time.  If that is good enough then this is a useful process.


__________________rate__________time(quantity)_________distance
WEST______________82_____________t_______________________x
EAST______________66_____________t_______________________y
Total____________________________________________________111


The variables x and y for distances are not really needed because the basic idea, RT=D, allowing expressions instead.


__________________rate__________time(quantity)_________distance
WEST______________82_____________t_______________________82t
EAST______________66_____________t_______________________66t
Total____________________________________________________111


HOW MUCH TIME PASSED for that distance total?
{{{highlight_green(82t+66t=111)}}}
{{{148t=111}}}
{{{t=111/148}}}
{{{highlight(t=3/4)}}}
45 minutes.