12 + 28 + 24 = 64
28 + 24 = 52
24 + 4 = 28
22 + 24 + 28 + 25 + 20 + 19 = 138
28 + 12 = 40
Yes, 12 plus 12 does equal 24.
The equation seems to equal 72.
12+12
4 + 24 + x = 28 + x
12 + 15 + 63 + 12 + 24 + 34 + 23 + 15 = 198
-24 + 12 = -12
16 + 24/2 = 28/1 or 28
24