Предмет: Алгебра, автор: vanya0813

Помогите пожалуйста, 100 баллов на кону

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Ответы

Автор ответа: daniilgolovin293

1

задание 1

$9x < 63 \\ x < 7 \\$

x принадлежит промежутку (-∞;7)

задание 2

х-20≥45

х≥65

х п.п. [65;+∞)

задание 3

3х≤21 т.к х≤7

vanya0813: Спасибо большое)

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