Предмет: Математика, автор: Лер123

Анна на 1 год младше Ольги, а Ольга на 3 года младше Елены . Сколько лет каждой, если вместе им 50 лет?

Ответы

Автор ответа: Gem1n1

Елена -х
Ольга - х-3
Анна - (х-3)-1
х+х-3+х-3-1=50
3х-7=50
3х=57
х=19(Елена)
Ольга 19-3=16
Анна 16-1=15

Автор ответа: Лер123

спасибо

Автор ответа: Лер123

очень помогла

Автор ответа: Gem1n1

помоГ :)

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