Предмет: Алгебра, автор: Henderason837907

ПОМОГИТЕ ПЛЗЗ,МНОГО БАЛЛОВ ДАЮ ЕЖЖЕ. решите системой !!
b1+b3=120
b1-b3=130

Ответы

Автор ответа: Пеппер

1

Объяснение:

b1+b3=120

b1-b3=130

складываем

2b1=250; b1=125

b3=125-130=-5

Ответ: (125; -5)

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