Question 903894
RT=D rate time distance


The question should be an accounting of distance.  Also account for time.


T=D/R;


Let x = minutes biking
Let y = minutes jogging


{{{1200*x+900*y=10*miles*5280(feet/mile)}}}
AND
{{{x+y=50}}}


Simplify the distance sum:
{{{12x+9y=528}}}
products of 3,...
{{{4x+3y=176}}}


The system to solve is then,
{{{highlight(system(4x+3y=176,x+y=50))}}}.