@KardashianKatya@MarieArtx Top line divide by 3 therefore headphones are 10 or 5 per half headphone
Second line headphones = 10 therefore a man is 20-10=10 for two men therefore a man = 5
Third line 13 - man (5) =8 therefore 2 grenades = 8 or 4 per grenade pair or 2 per grenade.
Fourth line 5+(5*2)=15