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ОЧЕНЬ СРОЧНО ПОЖАЛУЙСТАрешите систему уравнений методом сложения {6х-4=10 {11х+3у=39​ Смотреть ответ binamaksimchuk binamaksimchuk Ответ: Пошаговое объяснение: {6х-4у=10   *3 11х+3у=39​  *4 18х-12у=30 44х+12у=156 62х=186 х=186:62 х=3 6*3-4у=10 18-4у=10 -4у=10-18 -4у= -8 у= -8:(-4) у=2 Ответ(3;2) Новые вопросы в Математика Помогите пожалуйста. Очень нужна ваша помощь От рулона проволоки длиной 189 м отрезают куски проволоки длиной 85 см. Сколько кусков проволоки отрежут? Сколько проволоки останется? Произведение трехсот двух и нуля равно нулю? Произведение трехсот двух и нуля равно нулю? допоможіть будь ласка із задачею маленька коробка вміщує 12 олівців а велика 30. Знайдіть найменшу кількість олівців, які можна запакувати як лише в м … алі, так і лише у великі коробки​ Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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Answer 1

Давайте рассмотрим первую систему уравнений и найдем значение переменных x и y.

Система уравнений:

1. 6x - 4y = 10
2. 11x + 3y = 39

Для начала умножим оба уравнения на такие множители, чтобы избавиться от переменной y. Для этого домножим первое уравнение на 3, а второе на 4:

1. (3 * 6x) - (3 * 4y) = 3 * 10
2. (4 * 11x) + (4 * 3y) = 4 * 39

Это приведет нас к следующим уравнениям:

1. 18x - 12y = 30
2. 44x + 12y = 156

Теперь сложим оба уравнения, чтобы избавиться от переменной y:

(18x - 12y) + (44x + 12y) = 30 + 156

Складывая соответствующие части уравнений, получим:

18x + 44x - 12y + 12y = 30 + 156

62x = 186

Теперь разделим обе стороны на 62, чтобы найти значение x:

x = 186 / 62 x = 3

Теперь, когда мы знаем значение x, мы можем подставить его в одно из исходных уравнений, например, в первое:

6x - 4y = 10 6 * 3 - 4y = 10 18 - 4y = 10

Теперь выразим y:

-4y = 10 - 18 -4y = -8

Деление обеих сторон на -4 даст:

y = -8 / -4 y = 2

Итак, решение системы уравнений:

x = 3 y = 2

Ответ: (3;2)

Теперь мы можем рассмотреть ваши другие вопросы:

1. Отрежут кусков проволоки: 189 м / 85 см = 189 м / 0.85 м ≈ 222 куска проволоки.
2. Произведение 302 * 0 равно 0.
3. Минимальное количество оловцов, которое можно запаковать как в маленькую, так и в большую коробку, равно их наименьшему общему кратному, то есть 60 оловцов.