bonjour
soit x un cube
10 x + 2 = 2 x + 30
10 x - 2 x = 30 - 2
8 x = 28
x = 28/8 = 3.5 kg
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bonjour
soit x un cube
10 x + 2 = 2 x + 30
10 x - 2 x = 30 - 2
8 x = 28
x = 28/8 = 3.5 kg