1) х -18 1/3 = 15 2/3
х= 47/3 +55/3
х = 102/3
х = 34
2) (х-4 1/4)- 5 1/4 = 3/4
х - 17/4 = 3/4+21/4
х = 24/4 + 17/4
х = 6+4 1/4
х = 10 1/4
3) 6 7/15 + 13 1/15 + 7 7/15 = 26 + (7+1+7)/15 = 26+ 15/15 = 26+1 = 27
4) 13 1/3 + 4 1/2 + 3 2/3 + 5 1/2 = 16 3/3 + 9 2/2 = 17 + 10 = 27