Предмет: Математика, автор: CaHaRoKUwU2013

Знайдіть значення виразу 2(4а+3b)-3(2a+6b) якщо
6b-a=-1,9 (тільки можете, будь ласка, гарно розписати)

Ответы

Автор ответа: iramazurk

2

Ответ:

3,8

Пошаговое объяснение:

2(4а + 3в) - 3(2а + 6в) = 8а + 6в - 6а - 18в =

(8а - 6а) + (6в - 18в) = 2а + (-12в) =

-12в + 2а = -2(6в - а)

6в - а = -1,9

-2(6в - а) = -2 * (-1,9) = 3,8

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