Предмет: Математика, автор: gggdfghh

У Алёны и Маши 55 книг,у Маши и Вики 65 книг,у Алёны и Вики 40 книг.Сколько книг у каждой из девочек?

Ответы

Автор ответа: lbfrank

55+65+40=160 (книг) - всего х2
160/2=80 (книг) - всего
80-40=40 (книг) - у Маши
55-40=15 (книг) - у Алёны
65-40=25 (книг) - у Вики
Ответ: 40 у Маши, 15 у Алёны и 25 у Вики.

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