Предмет: Алгебра, автор: darina0818

Решите систему уравнений подробно

Приложения:

glebkravcov6: а каким способом?

Ответы

Автор ответа: glebkravcov6
1

4x-y=11

6x-2y=13

решение способом сложения

нам надо чтобы в каждом уравнении было противоположное

я первое умножил на -2

-8x+2y= -22

6x-2y=13

дальше мы все складываем

получается так

-2x= -9

x=4,5

и подставляем в любое уравнение я выбрал первое

4умножить на 4,5 минус y = 11

решаем

18-y=11

переносим меняя знаки

-y=11-18

-y= -7

и ещё раз меняем знаки чтобы игрик был с плюсом

y=7

ответ (x=4,5;y=7)

всё

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