Вопрос:
16) {5x + y = 14, (3x - 2y = -2.
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Решение:
- Из первого уравнения выразим y:
5x + y = 14
y = 14 - 5x
- Подставим значение y во второе уравнение:
3x - 2(14 - 5x) = -2
3x - 28 + 10x = -2
13x - 28 = -2
13x = 26
x = 2
- Подставим значение x в первое уравнение:
5(2) + y = 14
10 + y = 14
y = 4
Ответ: x = 2, y = 4
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