Question 685575
Time to mall + return time = 2

t=d/r
r= 12 mph going
r= 8 mph return

let distance be x

x/12 +x/8 =2

LCD = 24
multiply equation by 24
2x+3x=24*2

5x=48
x= 9.6 miles

t= d/r

r=8 on return
t = 9.6/8
t= 1.2 hours on return