Tìm x, biết: a) 2/9 : x + 5/6 = 0,5; b) 3/4 - (x - 2/3) = 1 1/3

a) 29:x+56=0,5

29:x=12−56

29:x=36−56

29:x=−26

x=29:−26

x=29.6−2

x=−23

Vậy x=−23

b) 34−x−23=113

34−x−23=43

x−23=34−43

x−23=912−1612

x−23=−712

x=−712+23

x=−712+812

x=112

Vậy x=112

c) 114:x−23=0,75

54:x−23=34

x−23=54:34

x−23=54.43

x−23=53

x=53+23

x=73

d) −56x+54:32=43

−56x+54=43.32

−56x+54=2

−56x=2−54

−56x=84−54

−56x=34

x=34:−56

x=34.−65

x=−1820

x=−910

Vậy x=−910