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2 năm trước
Giải các phương trình đưa được về dạng ax+ b =0 hoặc ax = -b a) 5x + 25 = 0 b) 2x + 5 = 60 – (3x – 25) c) 2x – 3 = 3(2x – 3) + x + 2 d, x - (5x - 1/6) = 8 - 3x/4 e, x + 3/2 + 2 - x/3 + 1 = x + 5/4
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