SOLUTION: A plane left Orlando int airport and travelled 3360 miles in 7 hours going against the wind. The plane made the return trip in 6 hours going with the wind. Find the speed of the wi

Algebra ->  Test -> SOLUTION: A plane left Orlando int airport and travelled 3360 miles in 7 hours going against the wind. The plane made the return trip in 6 hours going with the wind. Find the speed of the wi      Log On


   

Question 727286: A plane left Orlando int airport and travelled 3360 miles in 7 hours going against the wind. The plane made the return trip in 6 hours going with the wind. Find the speed of the wind .


I have the problem done but don't know how to solve it ; it's , 3360=6(r+w) 3360=7(r-w)

Please help !!!! (:
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
A plane left Orlando int airport and travelled 3360 miles in 7 hours going against the wind. The plane made the return trip in 6 hours going with the wind. Find the speed of the wind .
***
using what you have already set up:
3360=6(r+w) 3360=7(r-w)
6r+6w=3360
7r-7w=3360
..
42r+42w=7*3360
42r-42w=6*3360
subtract
84w=3360
w=40
speed of the wind =40 mph