Add the numbers in each option to find which total is 20.

• 8 + 5 + 5 = 18 ×
• 8 + 4 + 7 = 19 ×
• 9 + 4 + 6 = 19 ×
• 9 + 3 + 8 = 20 ✓

The equation 9 + 3 + 8 has a total of 20.

Final Answer: D: 9 + 3 + 8