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артем204567
артем204567
25.12.2020 14:18 •  Алгебра

Составьте систему уравнений

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Ответ:
skymiss
skymiss
02.09.2022 12:11

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Must Waste More Time...

0,0(0 оценок)
Ответ:
VadimqaFL
VadimqaFL
09.02.2020 23:47

чем мог

Объяснение:

Решение данной задачи будет исполнено с уравнения. Прежде всего нужно обозначить все необходимые данные для составления уравнения.

Пусть х - время работы первой трубы.

Пусть х + 6 - время работы второй трубы.

Теперь можно составить уравнение.

1/х + 1/(х + 6) = 1/4;

4 * (х + 6) + 4х = х * (х + 6);

4х + 24 + 4х = х2 + 6x;

х2 - 2x - 24 = 0;

Далее решаем задачу через дискриминант.

Д = 4 - 4 * ( - 24) = 4 + 96 = 100 = 10;

х1 = 2 + 10/2 = 6 (часов) - время работы 1 трубы.

х2 = 2 - 10/2 = - 4 - не подходит.

ответ: всю работу одна труба делает за 6 часов

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