Tìm x: |x| = 1/2

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Bài tập dạng cơ bản.
Bài 1 Tìm x
a) \x| = ;
=
2
e) 2-12x-1 | = 3
f) 2+12x-1 | = 3
g) 10-12x-1 | = 3
h) 10-12x+1 | = 5
b) 12x] = -2
c) |2x-1 | = 2
d) 12x-1 | = -2
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