Tìm x biết

Ti
a, 3/8 - 1/6x = 1/4 
b, x : 3/4 = 1/4 = -2/3
c, -1 3/8 = 2/3x = -3/4
d, 1/3 : x -20% 16/-32
e, 50% . x = 2/4 : 4/9 = -1/5 
g, (4,5 - 2x) . 1 4/7 = 11/14
h, 9/12 - (-1/3x -1 5/12) = 2 mũ 2 /9 
i, (0,6x - 1/2) . 3/4 - (-1) = 1/3