Решите неравенство {3x-15>0 {/x/меньше или равно 9
3х-15>0 ⇔ 3х > 15 | x | ≤ 9 ⇔ - 9 ≤ x ≤ 9 х > 5 - 9 ≤ x ≤ 9 //////////////////////////////// ---------[-9]------------------(5)-----[9]---------------→ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ Ответ. (5;9]