Предмет: Математика, автор: sislanikovpasa

помогите пожалуйста

Приложения:

Ответы

Автор ответа: Devillemon

2

Ответ:

ниже

Пошаговое объяснение:

Х: 20 = 180 : 9

х: 20 = 20

х = 20 * 20

х = 400

400 : 20 = 180 : 9

20 = 20

100 + х * 20 = 240

х * 20 = 240 - 100

х * 20 = 140

х = 140 : 20

х = 70

100 + 70 * 20 = 240

240 = 240

60 + 360 : х = 100

360 : х = 100 - 60

360 : х = 40

х = 360 : 40

х = 9

60 + 360 : 9 = 100

100 = 100

sislanikovpasa: спасибо большое

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