№1.3 7/9 + 5 1/6 = 3 14/18 + 5 3/18 = 8 17/188 7/16 + 3 3/10 = 8 70/160 + 3 48/160 = 11 118/160= 11 59/806 8/12 + 9 7/18 = 6 24/36 + 9 14/36= 15 + 38/36 = 16 2/36= 16 1/189 3/16 + 4 7/12 + 3 5/24 = 9 9/48 + 4 28/48 + 3 10/48= 16 47/48№2.8 3/4 - х = 3 5/16 х= 8 3/4 - 3 5/16 = 8 12/16 - 3 5/16 х= 5 7/16проверим:8 3/4 - 5 7/16 = 3 5/168 12/16 - 5 7/16 = 3 5/163 5/16 = 3 5/16(х- 9 3/7 ) + 5 8/21 = 6 5/14х - 9 3/7 = 6 5/14 - 5 8/21х - 9 3/7 = 6 15/42 - 5 16/42х - 9 3/7 = 41/42х=41/42 + 9 3/7 = 41/42 + 9 18/42 х= 10 17/42 проверим:(10 17/42 - 9 3/7 ) + 5 8/21 = 6 5/1410 17/42 - 9 18/42 + 5 16/42 = 6 5/1415 33/42 - 9 18/42 = 6 5/146 15/42 = 6 5/146 5/14 = 6 5/14