SOLUTION: Al's speed on his bicycle is 6 mph faster than Julie's speed on her bicycle. Al travels 72 miles the same time that it takes Julie to travel 48 miles. Find their speeds.

Algebra ->  Length-and-distance -> SOLUTION: Al's speed on his bicycle is 6 mph faster than Julie's speed on her bicycle. Al travels 72 miles the same time that it takes Julie to travel 48 miles. Find their speeds.       Log On


   

Question 1081701: Al's speed on his bicycle is 6 mph faster than Julie's speed on her bicycle. Al travels 72 miles the same time that it takes Julie to travel 48 miles. Find their speeds.
Found 2 solutions by addingup, Fombitz:
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
A = J + 6
72 = 48 + 6x
24 = 6x
x = 3 So the time is 3 hours
48/3 = 16 mph is Julie's speed
72/3 = 24 mph is Al's speed

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=J%2B6
.
.
A%2At=72
J%2At=48
So,
72%2FA=48%2FJ
48A=72J
Substituting,
48%28J%2B6%29=72J
48J%2B288=72J
24J=288
Solve for J then use either equation to solve for A.