For purchase of 6 badges from Katya there will not be enough 15 rubles. If she buys 4 badges that from her there will be 5 rubles. How many money at Katya?

194
1) 15 + 5 = 20 r there are two badges 2) 20: 2 = 10 r there is 1 badge 3) 4 * 10 = 40 r bought 4 badges 4) 40 + 5 = 45 r means was at it...........................................................
21
Answer add