m (1 arbuz) = 6 3/7
m (2 arbuz) = 6 3/7 - 1.4
m (2 arbuz) = 5.03 кг.
Общая масса: 6 3/7 + 5.03 = 5.46 кг
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Verified answer
m (1 arbuz) = 6 3/7
m (2 arbuz) = 6 3/7 - 1.4
m (2 arbuz) = 5.03 кг.
Общая масса: 6 3/7 + 5.03 = 5.46 кг