Предмет: Математика, автор: НикaБезHика

Решать с иксом.!
За три дня магазин продал 110 кг. конфет. Во второй день продал три восьмых того, что продал в первый. А в третий день столько, сколько в первые два дня вместе. Сколько килограммов конфет продал магазин в каждые из трёх дней?

Ответы

Автор ответа: triolana

в первый день х

во второй день 3/8х=0,375х

в третий день х+0,375х=1,375х

всего 110 кг

составим уравнение

х+0,375х+1,375х=110

2,75х=110

х=110:2,75

х=40 кг в первый день

40*0,375=15 кг во второй день

40+15=55 кг в третий день

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