Jodie is one unit (= Cindy) plus an extra 7 kg. Together they are 81 kg.<br><br>[[model:questions/solutions/q2551.png]]<br><br>• 2 units + 7 → 81 kg<br>• 2 units → 81 − 7 = 74 kg<br>• 1 unit (Cindy) → 74 ÷ 2 = 37 kg<br><br>Cindy weighs 37 kg.<br>Check: Jodie 44 + Cindy 37 = 81 kg, and 44 − 37 = 7 kg. ✓