Convert 4.07 kg to grams: 4.07 kg = 4070 g. Mickey is 650 g heavier than Dave.<br><br>
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&bull; Let Dave's luggage = 1 unit<br>
&bull; Mickey's luggage = 1 unit + 650 g<br>
&bull; Total = 2 units + 650 = 4070 g<br>
&bull; 2 units = 4070 − 650 = 3420 g<br>
&bull; 1 unit = 3420 ÷ 2 = 1710 g (Dave)<br>
&bull; Mickey = 1710 + 650 = 2360 g = 2.36 kg<br><br>
Mickey's luggage weighs 2.36 kg.<br>
Check: 1710 + 2360 = 4070 g = 4.07 kg. ✓