Set 7: Linear Equations (Advanced)

Choice D is correct. Choice D is the correct answer. 1. Subtract 4 x: $3x - 5 = 10$ 2. Add 5: $3x = 15$ 3. Divide by 3: $x = 5$ 4. Verify: $35- 5 = 30$ and $20+ 10 = 30$ ✓ Choice C is incorrect because it results from an error in the solution process. Choice B is incorrect because it results from an error in the solution process. Choice D is incorrect because it results from an error in the solution process.