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
1.I can't sing song,but I can play the quitar.
2.How did your phone break? Oh, it fell on the floor.
3.We aren't British.We're American.
4.There isn't any milk in the fridge.
5.What's that? It's an identity card.
6.Does Holly have any children?
7.I'm taller than my brother.
8.Would you like to fly a plane? No,I wouldn't.
9.The art gallery is closed on Monday.
10.What's the time ? It's half past three.
11.There aren't many books on the shelf.
12.I spoke to him on the phone ten minutes ago.
13.We hardly ever watch TV at the weekend.
14.They didn't like the film -they left after 10 minutes.
15.How much coffee do you drink? Quite a little.
16.They are the noisiest neighbours in the street.
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
1.I can't sing song,but I can play the quitar.
2.How did your phone break? Oh, it fell on the floor.
3.We aren't British.We're American.
4.There isn't any milk in the fridge.
5.What's that? It's an identity card.
6.Does Holly have any children?
7.I'm taller than my brother.
8.Would you like to fly a plane? No,I wouldn't.
9.The art gallery is closed on Monday.
10.What's the time ? It's half past three.
11.There aren't many books on the shelf.
12.I spoke to him on the phone ten minutes ago.
13.We hardly ever watch TV at the weekend.
14.They didn't like the film -they left after 10 minutes.
15.How much coffee do you drink? Quite a little.
16.They are the noisiest neighbours in the street.