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МатематикаВопрос:
521. Solve the system of equations: { x - 3y = 8, 2x - y = 6.
Ответ:
Решение:
- Выразим
xиз первого уравнения:x = 3y + 8. - Подставим во второе уравнение:
2(3y + 8) - y = 6. - Раскроем скобки:
6y + 16 - y = 6. - Приведем подобные слагаемые:
5y = -10. - Найдем
y:y = -2. - Найдем
x:x = 3(-2) + 8 = -6 + 8 = 2.
Ответ: x = 2, y = -2
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