Question 15 • 2025-2026 FBISD - Algebra I A (CR)
Combine the like terms on the left: 2x + 4x = 6x, so the equation becomes 6x − 3 = 21. Add 3 to both sides to get 6x = 24, then divide by 6 to find x = 4. The correct choice is C, x = 4.
AI-written and checked against the verified answer.