Предмет: Математика, автор: Жанна124567

Решите задачу , составляя уравнение
Сумма трёх чисел равна 72. Каждое следущее число на 12 больше предыдущего. Найдите эти числа.
Я знаю какие эти 3 числа ( 12 , 24 , 36 ) , но не могу составить уравнение...

Ответы

Автор ответа: kadiana11

x+2x+3x =72
х = 12
2x = 24
3x = 36

Автор ответа: kadiana11

6x = 72

Автор ответа: kadiana11

x = 12

Автор ответа: zeke000

арифметическая прогрессия

a1=d
a2=a1+d
a3=a1+2d

a1+a2+a3=72
d=12
a1=12
a2=12+12=24
a3=12+12*2=36

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: История, автор: vserdobinceva2

помогите пожалуйста срочно
Со всеми пжжжжжжжжжжжжжжжжжжжжжжжжжжжж

6 лет назад

Предмет: Английский язык, автор: wlnner

СРОЧНО!!!ПОМОГИТЕ ПОЖАЛУЙСТА С АНГЛИЙСКИМ!!!!!ДАМ 40 БАЛЛОВ!!!!!!
Open the brackets and put the verbs into Present Simple, Present Continuous, Future Simple, or use the construction ‘to be going to’. Write down full sentences.
№1
It (to be) my birthday tomorrow.
Look at those black clouds. I think it (to rain).
Maybe we (to stay) in and (to watch) television tonight.
I (to take) my exam in June. (plan)
I don't think I (to buy) that car.
We (to paint) the garage tomorrow. (intention)
We (to go) to the cinema on Sunday. (plan)
Tomorrow (to be) Wednesday.
Don't get up. I (to answer) the phone.
The class (to begin) Monday evening at 8:15 p.m.
№2
Put the verbs into the correct form: Present Simple, Present Continuous, Past Simple, Past Continuous, Present Perfect Simple, Present Perfect Continuous, or Past Perfect Simple. Write down full sentences.

Sandra has started training regularly since she (join) the gym.
We (arrive) at the film festival on Tuesday afternoon, but a lot of people (get) there in the morning and the queue at the entry gates (be) already long.
I (always/want) to visit New Zealand. Now that I finally (have) the chance, I (decide) to take it.
My aunt’s in Italy at the moment. She (have) such a great time she (want) to stay another six months.
Michael's health (seem) much better these days than it used to be. Perhaps he (take) more exercise as the doctor (advise).
№3
Make new words from the words in brackets. Use suffixes and prefixes. Write down full sentences.

I’ve never seen her react so (angry).
Paul behaved (calm).
That is an (polite) boy. He never says ‘Good morning’.
His lecture (bore) the class so everyone fell asleep.
This is a very (bore) subject.
The professional cleaner was very (help). She immediately understood what I needed.
She adopted a (home) cat.
We enjoyed a (success) event. Everything was great!
What a (beauty) painting. Do you know who painted it?
That shark looks dangerous, but it's totally (harm).

6 лет назад

Предмет: Українська література, автор: olenamajorenko1

Вісім чи дев'ять ?Сміховинки про безглуздів.Аналіз

6 лет назад

Предмет: История, автор: Аноним

Вопрос по ИСТОРИИ. Кто такие Эсхил, Еврипид, Аристофан, чем они знамениты? Помогите пожалуйста! Буду очень благодарен:-)

9 лет назад

Предмет: Математика, автор: afecenr

За 8 часов работы рабочий изготовил 96 деталей,изготавливая каждый час одинаковое количество деталей.сколько деталей он изготовит за 4 часа работы при той же производительности?

9 лет назад