985*. The theater gained 228.6 rub for 400 sold tickets. A part of tickets was sold at 0.45 rub for the ticket, and other part โ€” at the price is 60% more expensive. How many those and other tickets were sold?

279
Let x tickets it is sold at the price of 0, 45 rub, then 400 - x tickets 0,6ยท0,45 = 0, 72 rubles are sold at the price of 0, 45 +. Total sales 0, 45 x + 0.72 (400th) = 228.6, 0.27 x = at the price of 0, 45 rub and 400-220=180 tickets at the price are 60 more expensive than 59.4 x =220 tickets
219
Answer add