X - y = 2400/6 = 400 where x = speed of plane and y = speed of wind.
x + y = 2400/5 = 480 - flying with the wind
adding the 2 equations
2x = 880
x = 440
Speed of the plane with no wind = 440 mph
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Step-by-step explanation:
Answer:
don't ask for an explanation. your answer is below.
Step-by-step explanation:

Im not exactly sure what you are asking but 18 + 48 is equivalent and simplified!