Предмет: Математика, автор: pupil5a25

Будь ласка допоможіть,поставлю відмітку найкраща відповідь!

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Ответы

Автор ответа: nikkigoncik

Відповідь:

Покрокове пояснення:

не знаю яке завдання?

pupil5a25: всі треба

Автор ответа: timarkristinka

Ответ:

номер 481:

В 1 день собрали х (кг) кртошки

Во 2-ой день 2х (кг).

В 3-ий день х + 220 (кг)

Уравнение:

x + 2x +x + 220 = 1420

4x + 220 1420

4x1420-220

4x = 1200

x = 300 Это собрали в 1-ый день.

2x = 600 Это собрали во 2-ой день

x + 220 = 300+ 220 = 520 Это собрали в 3-ий день

Ответ: 300кг картошки собрали в 1-ый день, 600кг - во 2-ой день, 520кг - в 3-ий день.

Номер 482:

x + 3x + x - 2,25 = 24,75

5x = 27

х= 5,4 (блокнот)

5,4 • 3 = 16,2 (ручка)

5,4 - 2,25 = 3,15 (зошит)

Проверка : 16,2 + 3,15 + 5,4 = 24,75

номер 473:

в первый день - х страниц

Второй день - 2х страниц

Всего 78 страниц

2х+х=78

3х=78

х=26

надеюсь помогла❤️

pupil5a25: Очень

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