Предмет: Математика, автор: AraginaS

На спектакле присутствовали школьники начальных классов и дошкольники, всего 128 детей. Число дошкольников составило 60% числа школьников. Сколько школьников и сколько дошкольников смотрели спектакль?
Р.С. - помогите, пожалуйста, а то у меня ничего не выходит (((

Ответы

Автор ответа: nikaaa99

0

Школьники - х Дошкольники - у
х + у = 128
60% выразим через десятичную дробь - 0,6
0,6 х = у
Составляем систему х + у = 128
0,6х = у
В первом уравнении у заменяем на 0,6 х:
х + 0,6х = 128
1,6х = 128
х = 128 :
1,6 х = 80; у = 48  Школьников - 80 Дошкольников 48

Автор ответа: Смертишка

0

дети ненавидят театр, значит почти никого не было :D

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