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Решите систему уравнений удобным вам способом: а) {у=5х 5х+у=20 б) {2х-3у=6 4х+3у=27 ПОЖАЛУЙСТА ПОМОГИТЕ Я А ЭТОМ НЕ РАЗБИРАЮСЬ ДАЮ 50 БАЛЛОВ​ Смотреть ответ azimdzon azimdzon Ответ: Если понравился ответ выберите как лучший {2х-3у=6 4х+3у=27 второе второе методом подстановки не понятно подробно скажите да конечно по какому способу вы хотите Новые вопросы в Математика 2. Значення якого виразу є простим числом? Б 25-13 A 35:5 ​ Ежедневная задачка от меня на сто баллов сколько (35+68)*26-1234(чур калькулятором не пользоваться) ПОМОГИТЕ!!!!!! 1. Які прості дільники мають числа 8, 15, 24, 30? 2. Які спільні дільники мають числа 8 і 24? 3. Який НСД (15,30) будласка допоможіть мені з завданням N1 N2 N3 N4 N5 срочно​ помогите пожалуйста. задание на фото ​ 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 решим обе системы уравнений.

а) {у=5х, 5х+у=20

Первое уравнение говорит нам, что у = 5x. Теперь подставим это значение у во второе уравнение:

5x + 5x = 20

Теперь сложим коэффициенты при x:

10x = 20

Теперь разделим обе стороны на 10, чтобы найти значение x:

x = 20 / 10 x = 2

Теперь, когда мы знаем x, мы можем найти значение y, используя первое уравнение:

y = 5x y = 5 * 2 y = 10

Итак, решение этой системы уравнений:

x = 2 y = 10

б) {2x-3y=6, 4x+3y=27

Мы можем решить эту систему уравнений методом сложения/вычитания. Для этого сложим оба уравнения, чтобы устранить переменную y:

(2x - 3y) + (4x + 3y) = 6 + 27

Теперь складываем коэффициенты при x и y:

2x + 4x - 3y + 3y = 6 + 27

6x = 33

Теперь делим обе стороны на 6, чтобы найти значение x:

x = 33 / 6 x = 11 / 2 x = 5.5

Теперь, когда мы знаем x, мы можем найти значение y, подставив его в одно из исходных уравнений. Давайте используем первое уравнение:

2x - 3y = 6 2 * 5.5 - 3y = 6

11 - 3y = 6

Теперь выразим y:

-3y = 6 - 11 -3y = -5

Делим обе стороны на -3:

y = -5 / -3 y = 5/3

Итак, решение этой системы уравнений:

x = 5.5 y = 5/3

Надеюсь, это помогло! Если у вас есть еще вопросы, не стесняйтесь спрашивать.