Вопрос школьника по предмету Математика
После того как израсходовали 85%денег,осталось 45руб. Сколько было денег?
Ответ учителя по предмету Математика
45(руб) — 15%
x(руб) — 85%
15x = 85 × 45
15x = 3825
x = 3825 ÷ 15
x = 255
255 + 45 = 300(руб)
Ответ: 300 рублей было изначально.
Похожие вопросы от пользователей
1. My sister (to get) up at eight o’clock. 2. She (to be) a school-girl. She (to go) to school in the afternoon. 3. Jane (to be) fond of sports. She (to do) her morning exercises every day. 4. For breakfast she (to have) two eggs, a sandwich and a cup of tea. 5. After breakfast she (to go) to school. 6. It (to take) him two hours to do his homework. 7. She (to speak) French well. 8, My working day (to begin) at seven o’clock. I (to get) up, (to switch) on the radio and (to do) my morning exercises. It (to take) me fifteen minutes, At half past seven we (to have) breakfast. My father and I (to leave) home at eight o’clock. He (to take) a bus to his factory. My mother (to be) a doctor, she (to leave) home at nine o’clock. In the evening we (to gather) in the living-room. We (to watch) TV and (to talk).