Ответы на вопрос:
1)0≤3x≤9 |: 3 = 0≤x ≤3 ; x=1; 22)-4< -2x< 2 |: -2 = -1< x< 2 ; x=0; 13)-3< x+2≤-1 |- 2 = -5< x< -3; x = -15/4; -4. 4)-4< 2x-1≤2 |: 2 = -2< x-1/2≤1 |+ 1/2 = -3/2< x≤3/2 ; x=0; 1 5)-6< 5x-1< 5 |: 5 = -6/5< x-1/5< 1 |+ 1/5 = -1< x< 6/5 ; x=0; 1 6)0< 4x+3< 1 |: 4 = 0< x+3/4< 1/4 |- 3/4 = -3/2< x< -1/2 ; x=-3/16; 0 7)-2< 6x+7< 1 |: 6 = -1/3< x+7/6< 1/6 |- 7/6 = -3/2< x< -1 ; x=-3/21; 0
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