# SOLUTION: A plane can fly at a 1720 miles in 5 hours against the wind at max speed. The same plane can fly 1720 miles in 4 hours with the wind at max speed. What is the speed of the plane

Algebra ->  Algebra  -> Systems-of-equations -> SOLUTION: A plane can fly at a 1720 miles in 5 hours against the wind at max speed. The same plane can fly 1720 miles in 4 hours with the wind at max speed. What is the speed of the plane       Log On

 Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Algebra: Systems of equations that are not linear Solvers Lessons Answers archive Quiz In Depth

 Question 203528: A plane can fly at a 1720 miles in 5 hours against the wind at max speed. The same plane can fly 1720 miles in 4 hours with the wind at max speed. What is the speed of the plane with no wind? Let x = max speed, and y = wind speed.Answer by rfer(12647)   (Show Source): You can put this solution on YOUR website!x-y=430 x+y=344 (x=344-y) 344-y-y=430 -2y=86 -y=43 y=-43 wind speed =43mph airplane speed =387mph