Set 1: Linear Equations (Advanced)

Choice C is correct. Choice D is the correct answer. 1. Define: $x, x+1, x+2$. Middle is $x+1$. 2. Equation: $x + (x+1) + (x+2) = 33$ 3. Simplify: $3x + 3 = 33$ 4. Subtract 3: $3x = 30$ 5. Divide by 3: $x = 10$ 6. Middle: $x + 1 = 11$ 7. Verify: $10+ 11 + 12 = 33$ ✓ Choice C is incorrect because this is the smallest. Choice A is incorrect because this is the largest. Choice C is incorrect because it results from an error in the solution process.