SOLUTION: A plane flew 900 miles in 3 hours while flying with the wind. Against the wind, it took the plane 4 hours to travel 900 miles. Find the rate of the plane in calm air and the rate

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Question 876787: A plane flew 900 miles in 3 hours while flying with the wind. Against the wind, it took the plane 4 hours to travel 900 miles. Find the rate of the plane in calm air and the rate of the wind. (rate x time = distance)

Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
r = speed in no wind
w = wind speed

_______________speed________time________distance___EQUATION
WITH___________r+w__________3___________900________highlight%28%28r%2Bw%29%2A3=900%29
AGAINST________r-w__________4___________900________highlight%28%28r-w%29%2A4=900%29

Two linear equations in two unknown variables, r and w.