A cap is 1 unit and a shirt is 2 units. So 2 shirts = 4 units and 6 caps = 6 units — 10 units in all = $23.<br><br>[[model:questions/solutions/q4149.png]]<br><br>• 2 shirts + 6 caps = 4 + 6 = 10 units → $23<br>• 1 unit (cap) → $23 ÷ 10 = $2.30<br>• 1 shirt + 1 cap = 2 + 1 = 3 units → 3 × $2.30 = $6.90<br><br>A shirt and a cap together cost $6.90.<br>Check: shirt $4.60 + cap $2.30 = $6.90; 2(4.60) + 6(2.30) = $23. ✓