Try different combinations of 7, 8, 3, and 9 to make 20.<br><br>&bull; 8 + 3 + 9 = 20 (the number 7 is not used)<br><br>Check: 8 + 3 = 11, then 11 + 9 = 20. &#10003;<br><br>Final Answer: 8 + 3 + 9 = 20