(2,0 ĐIỂM) TÌM X, BIẾT
Bài 2. (2,0 điểm) Tìm x, biết: a) 2 13 + x = −2b) 3 1 1: 14 − 4 x = 45 − x − 2 = 25%
c)
3 1
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c)
3 1
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