№350
х : 13/14 = - 7/65
х = -7/65 * 13/14 = -1/5 * 1/2
х = - 1/10
№358
х : 25 = 19/45
х = 19/45 * 25= 95/9
х = 10 5/9
х : 5/41 = 1
х = 1 * 5/41
х = 5/41
х : 9/16 = 32
х = 32 * 9/16
х = 18