The coffee table costs $197 less than the chair, so the chair is one unit plus $197. Together $845.<br><br>[[model:questions/solutions/q2427.png]]<br><br>• 2 units + $197 → $845<br>• 2 units → $845 − $197 = $648<br>• 1 unit (table) → $648 ÷ 2 = $324<br>• Chair → $324 + $197 = $521<br><br>The chair costs $521.<br>Check: $521 + $324 = $845, and $521 − $324 = $197. ✓