1) 7 7/30-( 5 11/30-y)=3 19/30
5 11\30-у=7 7\30-3 19\30
5 11\30-у=6 37\30-3 19\30
5 11\30-у=3 18\30
у=5 11\30-3 18\30
у=4 41\30-3 18\30
у=1 23\30
2) X - 1 9\17 = 5 5\17 - 2 14\17
X - 1 9\17 = 4 22\17 - 2 14\17
X - 1 9\17 = 2 8\17
X = 2 8\17 + 1 9\17
X = 3 17\17
X = 4