4 + 2 x 9 = 4 + 18 = 22
-22
24 + 18 + 20 + 22 = 84
18+24+16+22 42+38 =80
1/2 + 7/22 = 11/22 + 7/22 18/22 9/11.
727
65
-22
69
22-15=7 and 18+7=25 so 25
The average of 18 and 22 is 18+22/2 = 20
The original questions is in parenthesis,71 plus 2 = 10 22 plus 31 =8 111 plus 22 =7(71) 7+1 "plus" 2 (2) = 10, (22) 2+2 (plus) (31) 3+1=8, (111) 1+1+1 "plus" (22) 2+2=7