Предмет: Математика, автор: annafed16062010

СРОЧНО!!! Петя говорит Васе: я тяжелее тебя в два раза. А Вася говорит Пете: А я легче тебя на 30 кг. Оба говорят правду. Сколько кг весит Петя?​

stalkerstrelok31: 30*2 = 60 кг
Ответ:60

Ответы

Автор ответа: RandoTapok
1

Ответ:

60

Пошаговое объяснение:

П=2В

В=П-30

Подставляем во 2 уравнение:

В=2В-30

-В=-30

В=30

П=30*2

П=60

Автор ответа: stalkerstrelok31
1

Ответ:

30*2 = 60 кг

Ответ: Вес Пети 60 кг.

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