Вопрос:
534. Solve the system of equations: { 2x + 3y = 1, 6x - 2y = 14.
Смотреть решения всех заданий с листаОтвет:
Решение:
- Умножим первое уравнение на 3:
6x + 9y = 3. - Вычтем второе уравнение из нового первого:
(6x + 9y) - (6x - 2y) = 3 - 14. - Приведем подобные слагаемые:
11y = -11. - Найдем
y: y = -1. - Подставим
y = -1 в первое уравнение: 2x + 3(-1) = 1. 2x - 3 = 1.2x = 4.x = 2.
Ответ: x = 2, y = -1
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