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МатематикаВопрос:
522. Solve the system of equations: { x - 4y = -1, 3x - y = 8.
Ответ:
Решение:
- Выразим
xиз первого уравнения:x = 4y - 1. - Подставим во второе уравнение:
3(4y - 1) - y = 8. - Раскроем скобки:
12y - 3 - y = 8. - Приведем подобные слагаемые:
11y = 11. - Найдем
y:y = 1. - Найдем
x:x = 4(1) - 1 = 3.
Ответ: x = 3, y = 1
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