Предмет: Алгебра, автор: evka28s

Известно что решением уравнения 21х-45у=100 является пара чисел где х=5 найдите соотвествующее значение у

Ответы

Автор ответа: prettypushkova

х = 5 у - ?
21 * 5 - 45у = 100
105 - 45у = 100
45у = 105 - 100
45у = 5
у = 5/45 = 1/9
Ответ: (5; 1/9).

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