Together they have $1400 in the ratio 7 : 3, so 10 units = $1400. To be equal each should hold 5 units; Mr A gives the 2 units above 5.<br><br>[[model:questions/solutions/q4511.png]]<br><br>• 10 units → $1400<br>• 1 unit → $1400 ÷ 10 = $140<br>• Mr A gives → 7 units − 5 units = 2 units = 2 × $140 = $280<br><br>Mr A must give Mrs A $280.<br>Check: Mr A $980 − $280 = $700; Mrs A $420 + $280 = $700. ✓