# SOLUTION: An airplane flew for 5 hours with a tail wine of 25 kph. The return flight against the same wind took 5.5 hours. Find the speed of the airplane in still air.

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 Click here to see ALL problems on Systems-of-equations Question 130881This question is from textbook algebra 1 : An airplane flew for 5 hours with a tail wine of 25 kph. The return flight against the same wind took 5.5 hours. Find the speed of the airplane in still air.This question is from textbook algebra 1 Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!5(X+25)=5.5(X-25) 5X+125=5.5X-137.5 5X-5.5X=-137.5-125 -.5X=-262.5 X=-262.5/.5 X=525 ANSWER FOR THE SPEED OF THE PLANE IN STILL AIR. PROOF: 5(525+25)=5.5(525-25) 5*550=5.5*500 2750=2750