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Daily puzzle · 2026-10-23 · Systems of Equations

Mathbound Daily Puzzle — 2026-10-23 — Systems of Equations Solution

Level 1

Solve for xx: 3x+9=213x+9=21.
  1. A.5
  2. B.9
  3. C.3
  4. D.4
  5. E.21

Answer: D

Key idea: Isolate xx.

Set it up: 3x=21−93x=21-9.

Solution: 44.

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Mathbound Daily Puzzle — 2026-10-23 — Systems of Equations Solution