Вопрос:
525. Solve the system of equations: { 2x + 3y = 3, 5x + 6y = 9.
Смотреть решения всех заданий с листаОтвет:
Решение:
- Умножим первое уравнение на 2:
4x + 6y = 6. - Вычтем новое первое уравнение из второго:
(5x + 6y) - (4x + 6y) = 9 - 6. - Приведем подобные слагаемые:
x = 3. - Подставим
x = 3 в первое уравнение: 2(3) + 3y = 3. 6 + 3y = 3.3y = -3.y = -1.
Ответ: x = 3, y = -1
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