Question 257967
rt=d
3h=x
3*(3h)=x+24
h=4 mph for the hiker
b=12 mph for the biker
check
3*4=12 hiker traveled 12 miles
3*12=36 biker traveled 36 miles
36-12=24 difference 24 miles
ok
NB in one hour the biker travels the same distance the hiker travels in 3 hours.