-20 + 15 = -5
-15 plus 20 is 5.
20 plus 15 percent = 23
10 + 15 + 20 = 45
-15+20 = 5
82
15 + 5 = 20
148
Negative 15 plus positive 20 equals 20 minus 15, which equals 5.
55 + 34 + 31 + 27 + 21 + 21 + 20 + 17 + 15 + 15 = 256
205
15
18 + 10 + 20 + 30 + 15 + 50= 143