Предмет: Математика, автор: Navare

Помогите пожалуйста.

Задание 1

3/8 от А равны 30% от числа (А+10)

Задание 2

При делении данного числа на 9 частное равно m, а при делении на 5 частное равно n. Найдите отношение 5n/m ( /- обозначает десятичную дробь)

Ответы

Автор ответа: 08031962

38а=310(а+10)

38а=310а+3

38а-310а=3

(15а-12а)40=3

340а=3

а=3:340

а=3*403

а=40

х9=m x5=n

5nm=(5*x5) x9 5* х5-числитель х9-знаменатель

5nm=x x9

5n5=x*9[

5nm=9

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