![]() We know the times are equal and so we writeĢ00 r − 30 = 300 r + 30 200 r − 30 = 300 r + 30 We divide the distance by the rate in each row, and place the expression in the time column. The wind decreases its speed and the rate is r − 30. The wind increases its speed and so the rate is r + 30. We are looking for the speed of the airplane. We fill in the chart to organize the information.
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