Предмет: Математика, автор: nastakorotaeva72

среднее арифметическое чисел 8; 10 и x равно 9,5 найти x​

Ответы

Автор ответа: nikitagubin2004
0

Ответ:

\frac{8+10+x}{2} = 9,5\\\frac{18+x}{2} = 9,5\\18 + x = 19\\x = 19-18\\x = 1

Ответ: х=1

Автор ответа: irina9191
0

Ответ:

1

Пошаговое объяснение:

(8+10+х)/2=9,5

4+5+х/2=9,5

Х/2=9,5-4-5

Х/2=0,5

Х=1

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