解答

設有x位同學

4箱 = x + 10
=> 1箱 = (x + 10)/4

5箱 = 2x - 16
=> 1箱 = (2x - 16)/5

(x + 10)/4 = (2x - 16)/5
=> 5x + 50 = 8x - 64
=> 3x = 114
=> x = 38

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