Question

3.Решите уравнение: а)способом сложения { х+4у+1=0 {3х-2у+17=0​ Посмотреть ответы bitenova240387 bitenova240387 Ответ: Пошаговое объяснение: iramazurk iramazurk Ответ: (-5; 1) Пошаговое объяснение: {х + 4у + 1 = 0 {3х - 2у + 17 = 0 {х + 4у = -1 {3х - 2у = -17 | * 2 {х + 4у = -1 {6х - 4у = -34 {7х = -35 {х + 4у = -1 1) 7х = -35 х = -35 : 7 х = -5 2) х + 4у = -1 -5 + 4у = -1 4у = -1 - (-5) 4у = -1 + 5 4у = 4 у = 4 : 4 у = 1 Новые вопросы в Математика ширина прямокутника 12 см,а його довжина втричі більша від ширини.знайти площу і периметр прямокутника ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️ ❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖ … ІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️ ❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️❤️ДОПОМОЖІТЬ❤️ДОПОМОЖІТЬ❤️​ Спростити вираз 8(2=х)-2(9-х) і обчислити його значення, якщо х=0,2 Срочно даю 20 балов. Дякую. координатной плоскости постройте график прямой пропорциональности y=3xСРОЧНО 100 БАЛОВ ДАМ​ зміни зросту іринки залежно від її віку подано в таблиці. вік іринки в роках зріст іринки в см 1 3 5 7 9 11 143 13 157 15 165 65 99 112 120 138 побуду … йте графік залежності зросту іринки від її віку. користуючис графіком, знайдіть: 1) зріст іринки в 4 роки; у 10 років; у 12 років; 2) вік іринки, коли її зріст був 102см,132см,160см, 3)наскільки метрів виросла іринка від 7 до 14 років 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

Решим уравнение методом сложения:

1. Исходные уравнения: { х + 4у + 1 = 0 { 3х - 2у + 17 = 0

2. Умножим первое уравнение на 3 и второе уравнение на 1, чтобы получить одинаковый коэффициент при х: { 3(х + 4у + 1) = 3 * 0 { 1(3х - 2у + 17) = 1 * 0 После раскрытия скобок получаем: { 3х + 12у + 3 = 0 { 3х - 2у + 17 = 0

3. Сложим полученные уравнения: (3х + 12у + 3) + (3х - 2у + 17) = 0 + 0 3х + 12у + 3х - 2у + 3 + 17 = 0 6х + 10у + 20 = 0 6х + 10у = -20

4. Перенесем всё в левую часть уравнения: 6х + 10у + 20 = 0 6х + 10у + 20 - 20 = 0 - 20 6х + 10у = -20

5. Теперь получили новое уравнение: 6х + 10у = -20

6. Разделим всё уравнение на 2, чтобы упростить коэффициенты: (6х + 10у) / 2 = -20 / 2 3х + 5у = -10

Таким образом, мы получили новое уравнение: 3х + 5у = -10. Это эквивалентно исходной системе уравнений.

Исходная система уравнений: { х + 4у + 1 = 0 { 3х - 2у + 17 = 0

Упрощенная система уравнений: { х + 4у = -1 { 3х + 5у = -10

Теперь можно решить эту систему уравнений.