Предмет: Математика, автор: borisovsi

Юра назвал три числа, следующие при счете одно за другим. Сумма этих чисел равна 21.Запиши эти числа

Ответы

Автор ответа: sasaova
2
пусть первое число х, тогда второе- (х+1), а третье (х+2)
получим уравнение
х+х+1+х+2=21
3х+3=21
3х=21-3
3х=18
х=6
ответ: 6, 7, 8
borisovsi: спасибо но училка спалит я в 4 классе)
Kolde: Тогда решай методом подбора
borisovsi: лан спасибо очень помог
Автор ответа: Shevtsovasa
0
а - первое число
а+1 - второе число
а+3 - третье число.
Если их сумма равна 21. то
а+а+1+а+2=21
3а+3=21
3а=21-3
3а=18
а=6 - первое число
6+1=7 - второе число
6+2=8 - третье число
borisovsi: спасибо большое
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