Ответы и объяснения

2014-01-29T14:37:12+00:00
1)
X - 84/19 = 102/19
X = 102/19 + 84/19
X = 186/19 = 9 целых 15/19
2)
449/48 - x = 833/48
-X = 833/48 - 449/48
-X = 384/48 = 8
X = -8