Предмет: Математика, автор: dasacybulskaa390

ПОМОГИТЕ ПРОШУ ПЖЖЖЖЖЖЖЖЖЖЖЖЖЖЖ

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Автор ответа: cofiaragul
1

Пошагова відповідь:

Задача 1

1)Нехай ціна за 1 кг яблук- х грн,

тоді ціна за один кг груш- 4+х грн.

2)Так як сказано,що ціна 3 кг груш = ціна за 5 кг яблук, то робимо рівняння щоб знайти ціну за 1 кг яблук:

3(4+х)=5х

12+3х=5х

12=2х

х=6 грн (це ціна за 1 кг яблук)

3) Щоб знайти ціну за 1 кг груш,треба:

6+4=10грн

Перевіряємо:

Щоб знайти Вартість за 3кг груш і за 5 кг яблук,треба

кількість (3 кг) помножити на ціну за 1 кг (10грн) = 30 грн

такі ж дії з яблуками 5 кг помножити на 6 грн =30 грн.

Так як відповіді рівні- задача вирішена правильно.

Відповідь: 1 кг груш- 10 грн, 1 кг яблук - 6 грн.

Задача 2

Пошагова відповідь:

Аналогічна задача.

1)Складаємо рівняння:

3(12+х)=5х

36+3х=5х

36=2х

х=18 грн (ціна за 1 кг печива)

2)12+18=30 грн (ціна за 1 кг цукерок)

Підставимо в рівняння:

36+54=90

Отже рішення правильне.

Відповідь: ціна за 1 кг печива= 18 грн, ціна за 1 кг цукерок= 30 грн.


cofiaragul: якщо відповідь сподобалася- постав йому "лучший ответ" будь ласка.
dasacybulskaa390: лучший ответ
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