Предмет: Математика, автор: Викуся1313

среднее арифметическое чисел 6,4 и x равно 8,5 Найдите число x

Ответы

Автор ответа: nainsi

(6,4+х)/2=8,5
6,4+х=17
х=10,6

Автор ответа: Юлиич

(6,4+х):2=8,5;
6,4+х=8,5*2;
6,4+х=17;
х=17-6,4;
х=10,6
Ответ:х=10,6.
Я думаю, что так.Надеюсь, что помогла:з

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