Предмет: Алгебра, автор: nata11041974

Найдите неизвестное число, если сумма полуразности этого числа и числа 14,6 и полусуммы числа 3,8 и неизвестного числа равна 5

Ответы

Автор ответа: КНВ

полу разность неизвестного числа и числа 14.6: (х-14.6)/2

полусумма чисел 3.8 и неизвестного: (3.8+х)/2

их сумма: (х-14.6)/2+(3.8+х)/2=5

умножаем всё на 2, получим:

х-14,6+3,8+х=10

2х=20,8

Х=10,4

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