Reported speech 1. Lucas told Lea, "I will not go swimming with you" 2. "Where are you from?" he asked me 3. "Don't play with matches," his mother said. 4. I'Il clean the car tomorrow," Tim said to his father 5. "Please stop making that noise!" she said to him. "I can't concentrate.
The Kama River
The river Kama is an important river in Russia. Situated in west-central Russia, it is one of the longest tributaries of the Volga and 1, 805 kilometers long. It starts its journey in Udmurtia, near the town of Kuligi and flows north, then east, south and south-west until it reaches the Volga river. There are many cities situated on the banks of the Kama, such as Solikamsk, Berezniki and Perm.
The Kama is a valuable waterway to the Urals and Siberia and is, therefore, often used as a trade route. Its waters support a wide variety of industries and its floodplains are rich in salt and potassium. There are hydroelectric stations at Perm and petroleum is extracted in the Sylva and Iren valleys.
Although the Kama is mostly associated with industry, it remains a beautiful river nonetheless. During the winter months when the river is frozen, you can find people ice-skating and during the warmer months of the year many enjoy strolling along its banks.
Пошаговое объяснение:
Обозначим красные воздушные шары - "К", зелёные - "З", синие - "С".
Пусть в коробке лежит х "К". ⇒ "З"=х/8 , а "С"≥1.
x+\frac{x}{8}+C=19.\ \ \ \ \ \ \ \ (1)x+
8
x
+C=19. (1)
Количество воздушных шаров - целое число. ⇒
\frac{x}{8}
8
x
- должно быть целым числом. Исходя из условия задачи х может равняться 8 и 16.
Подставляем х=8 в уравнение (1).
\begin{gathered}8+\frac{8}{8}+C=19\\8+1+C= 19\\9+C=19\\C=10.\end{gathered}
8+
8
8
+C=19
8+1+C=19
9+C=19
C=10.
Но по условию задачи "К">"C"≥1 ⇒ х≠8.
Подставляем х=16 в уравнение (1).
\begin{gathered}16+\frac{16}{8} +C=19\\16+2+C=19\\18+C=19\\C=1.\end{gathered}
16+
8
16
+C=19
16+2+C=19
18+C=19
C=1.
По условию задачи "К">"C"≥1 ⇒ x=16