1) 6 1/24 - 1 3/8 = 6 1/24 - 1 9/24 = 5 25/24 - 1 9/24 = 4 16/24 = 4 2/3
2) 3 3/4 + 1 5/8 = 3 6/8 + 1 5/8 = 4 11/8 = 5 3/8
3) 4 2/3 х 5 3/8 = 14/3 х 43/8 = 602/24 = 25 2/24 = 25 1/12
Ответ 25 целых 1/12
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( 7/9Х - 2/3 ) * 5/6 = 5/6
7/9X - 2/3 = 5/6 : 5/6
7/9X - 2/3 = 1
7/9X = 1 + 2/3
7/9X = 5/3
7/9X = 15/9
7X = 15
X = 15/7
X = 2 1/7
Ответ Х = 2 целых 1/7