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December 21, 2014

December 21, 2014

Posted by **Delia** on Monday, June 8, 2009 at 5:53pm.

Could you please explain how to solve this problem? Thank you so much! :D

- Algebra -
**Reiny**, Monday, June 8, 2009 at 6:50pmlet the speed of the plane with no wind be x mph

let the speed of the wind be y mph

4(x+y) = 600 or

x + y = 150 (1)

5(x-y = 600 or

x - y = 120 (2)

Add (1) and (2) etc.

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