2 3/5 : (х + 1 3/14) - 1 2/5=1/3

2 3/5 : ( х + 1 3/14 ) - 1 2/5 = 1/3 2 3/5 : ( х + 1 3/14 ) = 5/15 + 1 6/15 2 3/5 : ( х + 1 3/14 ) = 1 11/15 Х + 1 3/14 = 13/5 : 26/15 Х + 1 3/14 = 3/2 Х = 1 1/2 - 1 3/14 Х = 1 7/14 - 1 3/14 Х = 2/7