5 + -13 + 18 = 5 - 13 + 18 = 10
= 18x + 13
2 + 5 + (3 x 2) + 4 +2 + 17 + (2 - 13) + 5 = 30
It is: 7+13-6+5 = 19
-13
It is: 5+13+18 = 36
(13+5)18=13+(5+18)
5 + -13 + 18 = 5 - 13 + 18 = 10
13
(-5)+(-8)+(-13)+(-16)+(-8)+11+0 11-16-13-8-8-5 -5-13-16-5 -18-21 -39
14 + 5 + 13 + 4 + 9 = 45
13 + 5 = 18
13 + (-5) = 8
basically you asked what -28+21 which equals -7
3x+5 = 2x+13 3x-2x = 13-5 x = 8
if u mean +13 - (+8) = 5, then yes
= 18x + 13