Question 12 • Mathematics 8
Distribute 0.45: 0.45x + 0.72 + 5x = 18. Combine like terms and subtract 0.72 to get 5.45x = 17.28, so x = 17.28 ÷ 5.45 ≈ 3.1706. Rounded to the nearest hundredth, x is 3.17, choice D.
AI-written and checked against the verified answer.