8 2/15 - (х + 3 5/14 ) : 5 5/8 = 7 1/3
(х + 3 5/14) : 5 5/8 = 8 2/15 - 7 1/3
(х + 3 5/14) : 5 5/8 = 7 17/15 - 7 5/15
(х + 3 5/14) : 5 5/8 = 4/5
х + 3 5/14 = 4/5 * 5 5/8
х + 3 5/14 = 4/5 * 45/8
х+ 3 5/14 = 9/2
х + 3 5/14 = 4 1/2
х= 4 1/2 - 3 5/14 = 4 7/14 - 3 5/14 = 1 2/14
х= 1 1/7
проверим:
8 2/15 - ( 1 1/7 + 3 5/14 ) : 5 5/8 = 7 1/3
8 2/15 - ( 1 2/14 + 3 5/14 ) : 5 5/8 = 7 1/3
8 2/15 - 4 1/2 : 5 5/8 = 7 1/3
8 2/15 - 9/2 * 8/45 = 7 1/3
8 2/15 - (1*4)/(1*9) = 7 1/3
8 2/15 - 4/9 = 7 1/3
8 6/45 - 36/45 = 7 1/3
7 51/45 - 36/45 = 7 1/3
7 15/45 = 7 1/3
7 1/3 = 7 1/3