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Автор - GhffjfrAngelya

Света вымала в 2 раза больше чем инна, а Ия на 3 чашки меньше чем Инна, всего вымыли 17 чашек, сколько вымыла Инна?

Ответ

Автор - египет
2х+х+х-3=17
4х-3=17
4х=17+3
4х=20
х=20:4
х=5
Ответ:5


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