ДАНО
а)
(х + 1/8) - 2 5/6 = 1,3
(х + 1/8 = 1 3/10 + 2 5/6 = 13/10 + 17/6 = (39 + 85)/30 =124/30 = 4,2/15
х = 4 2/15 - 1/8 = 4 1/120
б)
2 11/12 - (х - 3/8) = 1,25
(х - 3/8) = 2 11/12 - 1,25 = 1 2/3
х = 1 2/3 + 3/8 = 2 1/24
в)
(х + 1/6) - 2 5/8 = 3 11/24
х + 1/6 = 3 11/24 + 2 5/8 = 6 1/12
х = 6 1/12 - 1/6 = 5 11/12