(43 5\43 + x) - 31 8\43= 19 40\43
43 5/43 + х = 31 8/43 + 19 40/43
43 5/43 + х = 51 5/43
х = 51 5/43 - 43 5/43
х= 8
(43 5\43 + x) - 31 8\43= 19 40\43
43 5/43 + х = 31 8/43 + 19 40/43
43 5/43 + х = 51 5/43
х = 51 5/43 - 43 5/43
х= 8