Предмет: Математика, автор: Yuliapaa

Сумма трех чисел 12,3. Первое число в 3 раза больше второго, а третье число на 2,4 меньше первого. Найдите эти числа.

Ответы

Автор ответа: Vandamu

Пусть х-второе число, (3х)-первое число, (3х-2,4)-третье число.Т.к. сумма чисел равна 12,3,составим уравнение:х+3х+3х-2,4=12,37х=12,3+2,47х=14,7х=14,7/7х=2,12.1-второе число.3*2,1=6,3-первое число.6,3-2,4=3,9-третье число.Ответ:6,3;2,1;3,9.

Автор ответа: Nowi4ek

х+3х+3х-2,4=12,3
7х=14,7
х=2,1 - второе
3*2,1=6,3 - первое
6,3-2,4=3,9 = третье

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