Предмет: Математика, автор: Rigby12

Пожалуйста, помогите решить 2 задачи. Математика, 10 класс

Приложения:

Ответы

Автор ответа: darakolasni

Ответ:

7) z-x

Пошаговое объяснение:

5) 25000+17552=42552

21000+15000=36000

42552-36000=6552руб

1,3×5,2=6,76руб/ч

5,2×4,1=21,32руб/ч

21,32х-6,76х=6552

х=450 ч

Ответ: 450 часов

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