Вопрос школьника по предмету Математика
Среднее арифметическое двух чисел равно 8,5.
Найди эти числа, если одно из них на 2,6 больше другого.
Пж дайте ответ с решением
Найдите меньшее и большее число.
Ответ учителя по предмету Математика
Ответ:
7,2 — первое число 9,8 — второе число
9,8 больше 7,2
Пошаговое объяснение:
Пусть первое число -х, тогда второе — х+2,6 , составим уравнение:
(х + (х+2,6))/2 = 8,5
х + (х+2,6) = 8,5*2
х + (х+2,6) = 17
2х + 2,6 = 17
2х = 17-2,6
2х = 14,4
х = 14,4/2
х = 7,2 — первое число
7,2 + 2,6 = 9,8 — второе число
9,8 больше 7,2
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