( 3 9/14 + x ) - 2 5/14 = 6 7/14
(3 9/14+х) - 2 5/14= 6 7/14 3 9/14 + х =6 7/14 + 2 5/14 3 9/14 + х=8 12/14 х = 8 12/14 - 3 9/14 х= 5 3/14 Ответ: 5 3/14
(3 9/14 + х) - 2 5/14 = 6 7/14 1 4/14 + х = 6 7/14 х = 6 7/14 - 1 4/14 х = 5 3/14