Tìm x, biết: a) 7/6 - x : 3/4 = 1/12; b) 4/3 + 5/8 : x = 1/12; c) -1/4 + 1/4 : x = -5/8

Tìm x
a, 7/6 - x : 3/4 = 1/12
b, 4/3 + 5/8: x = 1/12
c, -1/4 + 1/4 : x = -5/8
d, 11/12 - (2/5 + x) = 2/3
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