Ответы на вопрос:
А)99/100< x< 1⇒360/400< x< 400/400⇒x=370/400,380/400,390/400 или х=37/40,19/20,39/40 б)2/5< x< 3/5⇒8/20< x< 12/20⇒x=9/20,10/20,11/20 или х=9/20,1/2,11/20 в)1/3< x< 1/2⇒8/24< x< 12/24⇒x=9/24,10/24,11/24 или х=3/8,5/12,11/24 a)9/10< x< 1⇒36/40< x< 40/40⇒x=37/40,38/40,39/40 или х=37/40,19/20,39/40 б)3/7< x< 4/7⇒12/24< x< 16/28⇒x=13/24,14/28,15/28 или х=13/24,7/14,15/28 в)1/4< x< 1/3⇒15/60< x< 20/60⇒x=16/60,17/60,18/60 или х=4/15,17/60,3/10
|x| - 3 = 0 |x| = 3 x1 = -3; x2 = 3 |x| + 2 = 0 |x| = -2 - нет решений 4 - |x| = 0 |x| = 4 x1 = -4; x2 = 4 2|x| - 5 = 0 2|x| = 5 |x| = 2,5 x1 = -2,5; x2 = 2,5 7 - 2|x| = 0 2|x| = 7 |x| = 3,5 x1 = -3,5; x2 = 3,5 4|x| - |x| = 9 3|x| = 9 |x| = 3 x1 = -3; x2 = 3
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