Question 1200577
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This kind of problem is encountered so often that it is useful to learn a quick way to find the answer informally -- as long as formal algebra is not required.<br>
After determining that the speeds with and against the wind are 240 and 160 miles per hour, logical reasoning tells you that the 240mph is the plane speed plus the wind speed and the 160mph is the plane speed minus the wind speed -- and that means the plane speed is halfway between 160mph and 240mph: 200mph.  And then the wind speed is the difference between 240mph and 200mph (or between 160mph and 200mph).<br>
ANSWERS (informally): plane speed 200mph; wind speed 40mph<br>