Предмет: Математика, автор: ttttoooo659

Середнє арифметичне чисел х, 12 і 17 дорівнює 13.Знайдіть х​

Ответы

Автор ответа: vintoniakyuriu
7

Ответ:

12+17=29

40-29=11 х=11

40÷3=13,3

Автор ответа: mteryaeva993
17

Ответ:

Пошаговое объяснение:

(х+12+17):3=13

(х+29)=13*3

х+29=39

х=39-29

х=10

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