Контрольные задания > |3x - 4| + 7x при x = -7

Вопрос:

|3x - 4| + 7x при x = -7

Ответ:

|3x - 4| + 7x = |3(-7) - 4| + 7(-7) = |-21 - 4| - 49 = |-25| - 49 = 25 - 49 = -24

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