Предмет: Математика, автор: amirivanov1985

На трех книжных полках стояли книги. на первой было в 4 раза меньше чем на второй, а на третьей на 8 меньше чем на первой. Всего 94 книги.
Помогите надо решить с помощью уравнения!

Ответы

Автор ответа: znania1ru
1

Ответ:

На первой полке 17 книг

На второй полке 68 книг

На третьей полке 9 книг

Пошаговое объяснение:

1п- ? но в 4 раза меньше

2п- ?

3п- ? но на 8 меньше

(СТРЕЛОЧКИ САМ НАРИСУЙ)

Пусть на первой полке стояло х книг. Тогда:

х+4х+х-8=94

6х=94+8

6х=94+8

6х=102

х=102:6=17(На первой полке)

4х=4×17=68(На второй полке)

х-8=17-8=9(На третьей полке)

Проверим:

17+68+9=94

Ответ: На 1-ой полке 17

На 2-ой полке 68

На 3-ей полке 9

(МОЖЕТ БЫТЬ ЭТО И НЕ ПРАВИЛЬНО, НО Я ДУМАЮ ТАК)




amirivanov1985: Очень благодарю! Пытался решить эту задачу очень долго.
Автор ответа: Violetusa1212
0

??????

Пошаговое объяснение:

Интересные вопросы
Предмет: Русский язык, автор: rashanelox
Предмет: Английский язык, автор: KarinaKarma
Помогите плиз
Даю 50б

1. Choose the right option.

I don’t mind (to clean / cleaning) my room.

Jane hates (to make / making) breakfast.

The story was so interesting, they couldn’t stop (to listen / listening) to it again and again.

Sarah and Mike avoid (to meet / meeting).

Emily promised (to buy / buying) apples on her way home.

Do you remember (to pay / paying) all your bills?

The doctor recommended (to have / having) a rest.

I would like (to invite / inviting) my friends to the party.

Alex started (to learn / learning) French last year.

Bob offered (to go / going) for a walk.

Amy tried (to listen / listening) to her teacher attentively.

I do my best (to keep / keeping) fit.

Ted's father used (to eat junk food / eating junk food) when he was younger.

Anthony dislikes (to spend / spending) time in the countryside.




2. Write the infinitive with the particle to or without it.

Pam can (to jump / jump) very high.

Let me (to see / see) your new bag.

The coach told Andrew (to do / do) the exercise again.

You always make me (to feel / feel) happy.

I would rather (to take / take) a bus to get to the shopping centre.

Do you want me (to write / write) the letter?

Everyone must (to follow / follow) this rule.

Carol decided (to move / move) to another city.

Students hope (to finish / finish) their school projects in time.

You ought (to do / do) this task.

Children were allowed (to play / play) in the garden.

Pamela felt somebody (to touch / touch) her shoulder.

You'd better (to make / make) a sandwich for breakfast.

Jane is too small (to go / go) to school.
Предмет: Биология, автор: fasatanberkovesh