Решить неравенство -4,2<=3x+2.4<=6
-4.2≤3x+2.4≤6 | (-2.4) -4.2-2.4≤3x+2.4-2.4≤6-2.4 -6.6≤3x≤3.6 | (:3) -2.2≤x≤1.2 x∈[-2.2;1.2]