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2 năm trước
1) Tìm x biết: a) |x+2|+|x-3|=2x-4 b) 3|x-1|- 2 |x+3 |=7-x c) |(x+1)(x-3)|= 7-x d)|x+2|+|x+5|= 5x mk đang cần gấp !!!
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