9целых 16/51- X=4целых 11/34 X+2целых 11/52=7целых 5/39

а) 9 16/51 - х = 4 11/34;х = 9 16/51 - 4 11/34;х = 9 32/102 - 4 33/102;х = 8 134/102 - 4 33/102;х = 4 101/102.Ответ: х = 4 101/102.б) х + 2 11/52 = 7 5/39;х = 7 5/39 - 2 11/52;х = 7 20/156 - 2 33/156;х = 6 176/156 - 2 33/156;х = 4 143/156.Ответ: 4 143/156.