Предмет: Алгебра, автор: adriana90

За + b = 20 Дана система уравнений: а — b = 0 Вычисли значение переменной b.

Ответы

Автор ответа: Svetishche

2

Ответ:

в=5

Объяснение:

3а + b = 20

а — b = 0

Складываем правую часть с правой, а левую с левой и получаем

За + b+а — b = 20+0

4а=20

а=5, тогда в=5, тк а — b = 0

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