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Word problem - 2 planes are 1400 miles apart and traving towards each other

2 planes are 1400 miles apart and traving towards each other. One plane is traveling 120 miles per hour faster than the other. The plans meet in 2 .5 hours. Find the speed of each plane.

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Let the speed of one plane be x and the other plane be x + 120.
Then we ...

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