Question 818576
PATH_____________speed_____________time______________distance
TO_______________525_______________{{{2/3+x}}}_____________{{{525(x+2/3)}}}
BACK_____________600_______________x_________________600x


The assigning done is x=time to fly "back".  Unit of time is HOURS.
The distance is the same both directions.
{{{525(x+2/3)=600x}}}