A: What were you doing when the robbery took place?
B: I was standing in the queue.
A: What happened next?
B: Two men were pushing their way to the front. One of them was holding a gun.
A: Then what the men were doing?
B: They ordered the cashier to give them the money.
A: How did police find out about the robbery?
B: Well, the cashier set off the alarm while the robbers were putting the money in a bag.
A: And what happened when the police arrived?
B: The man with the gun dropped it, but it wasn't a real gun after all; it was a plastic one.
Объяснение:
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}
- 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+
+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+
16
16+2+C=19
18+C=19
C=1.
По условию задачи "К">"C"≥1 ⇒ x=16
A: What were you doing when the robbery took place?
B: I was standing in the queue.
A: What happened next?
B: Two men were pushing their way to the front. One of them was holding a gun.
A: Then what the men were doing?
B: They ordered the cashier to give them the money.
A: How did police find out about the robbery?
B: Well, the cashier set off the alarm while the robbers were putting the money in a bag.
A: And what happened when the police arrived?
B: The man with the gun dropped it, but it wasn't a real gun after all; it was a plastic one.
Объяснение:
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