1. –x + 5 > 0 ⇒ x < 5
2. 3x < – 15 ⇒ x < –5
Ответ: x ∈ (–∞; –5).
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1. –x + 5 > 0 ⇒ x < 5
2. 3x < – 15 ⇒ x < –5
Ответ: x ∈ (–∞; –5).