Ответ: 6 3/14 .

Пошаговое объяснение:

5 9/14 +1 3/7 * ( 2 2/5 - 3 1/4 : 1 5/8 ) = 6 3/14 .

1 ) 3 1/4 : 1 5/8 = (13/4 ) : ( 13/8 ) = (13/4 ) * ( 8/13 ) = 2 ;

2 ) 2 2/5 - 2 = 2/5 ;

3 ) 1 3/7 * ( 2/5 ) = ( 10/7 ) * ( 2/5 ) = 4/7 ;

4 ) 5 9/14 + 4/7 = 5 17/14 = 6 3/14 .