Решите двойное неравенство
-9 ≤ 2х+1 ≤ 10
а)(-5; 4,5)
б) [-4; 6,5]
в) [-10;9 ]
г) [-5;4,5 ]
-9 ≤ 2х+1 ≤ 10
а)(-5; 4,5)
б) [-4; 6,5]
в) [-10;9 ]
г) [-5;4,5 ]
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-9 ≤ 2х+1 ≤ 10 |-1-9-1 ≤ 2х+1-1 ≤ 10-1
-10 ≤ 2х ≤ 9 |:2
-5 ≤ х ≤ 4.5