Предмет: Математика, автор: FALK43322

Упростите выражение:7x-3,2-(2x+1)5. И найдите его значение при x=-1,5

Ответы

Автор ответа: Empers

Ответ:

-3,7

Пошаговое объяснение:

7x-3,2-(2x+1)*5 = 7x-3,2-10x-5 = -3x-8,2

при x=-1,5 => -3*(-1,5)-8,2=4,5-8,2=-3,7

Автор ответа: Girday337

Ответ:

-13,5

Пошаговое объяснение:

7x - 3,2 - (2x + 1) * 5 = 7x - 3

Если x = -1,5 , то

7x - 3 = 7 * (-1,5) - 3 = -13,5

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