Предмет: Математика, автор: ineza

Помогите решить пожалуйста)
Задача
У Серёжи и Пети всего 69 марок.
У Пети марок в 1(целую)78 больше чем у Серёжи. Сколько марок у каждого?
Заранее спасибо.

Ответы

Автор ответа: kireevadiana
0
у Серёжки 23 марки, а у Пети 46!
потому что: у Серёжи - х, а у Пети 2х.
х + 2х = 69
3х = 69
х = 23
2х = 46
Автор ответа: ineza
0
Спасибо)
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