Choice Ahoice D is the correct answer.

1. Start with the equation: $2(4x + 2) = 20$
2. Distribute: $8x + 4 = 20$
3. Subtract 4: $8x = 16$
4. Divide by 8: $x = 2$
5. Verify: $2(4(2) + 2) = 2(10) = 20$ ✓

Choice Ahoice B is incorrect because calculation error.

Choice Ahoice D is incorrect because calculation error.

Choice Ahoice C is incorrect because calculation error.