The coffee table costs $197 less than the chair, so the chair is one unit plus $197. Together $845.

Coffee table?Lazy chair?$197$845

Plain numbers are given; italic underlined numbers are worked out.

  1. 2 units + $197 → $845
  2. 2 units → $845 − $197 = $648
  3. 1 unit (table) → $648 ÷ 2 = $324
  4. Chair → $324 + $197 = $521

The chair costs $521.

Check: $521 + $324 = $845, and $521 − $324 = $197. ✓