Yennie is one unit (= Peter) plus an extra 5 kg. Together they are 103 kg.<br><br>[[model:questions/solutions/q2552.png]]<br><br>• 2 units + 5 → 103 kg<br>• 2 units → 103 − 5 = 98 kg<br>• 1 unit (Peter) → 98 ÷ 2 = 49 kg<br>• Yennie → 49 + 5 = 54 kg<br><br>Yennie is 54 kg.<br>Check: Peter 49 + Yennie 54 = 103 kg, and 54 − 49 = 5 kg. ✓