Question 269847
D=RT 
D=3.5*.2
D=.7 miles running.
8.2-.7=15(T-.2)
7.5=15T-3
15T=7.5+3
15T=10.5
T=10.5/15
T=.7 HOURS BIKING.
Proof:
8.2-.2*3.5=15(.7-.2)
8.2-.7=15*.5
7.5=7.5