02.04.2022

решить систему уравнений способом подстановки х+3=5, 2х-у=3

Вопрос школьника по предмету Математика

Ответ учителя по предмету Математика

Из первого уравнения системы выражаем х:

х=5-3=2

Подставляем во второе уравнение системы значение х:

2*2-у=3

4-у=3

у=1

Ответ:2;1

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решите уравнение 3a-(5-a)=19 заранее спасибо