Предмет: Алгебра, автор: ponomarevamilana835

Решите систему уравнений:
7х+2у=555
5х+3у=475

Ответы

Автор ответа: marina733071

Ответ:

$7x + 2y = 555 \\ 5x + 3y = 475 \\ 3 \times (7x + 2y) - 2(5x + 3y) = 3 \times 555 - 2 \times 475 \\ 11x = 715 \\ x = 65 \\$

Подставим найденную переменную в первое уравнение

$7(65) + 2y = 555 \\ y = 50 \\$

Ответ x=65

y=50

где 555 число мы • 3

где 475 число мы • 2

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Решите систему уравнений:7х+2у=5555х+3у=475​

Ответы

Решите систему уравнений:
7х+2у=555
5х+3у=475