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nguyen01suny
2 năm trước
Bài 1: Tìm x Z sao cho: a. |-5|.|x| = |-20| b. |x| < -5 c. 12≤ | x| < 15 d. |x - 1| + (-3) = 17 e. |x + 1| - (-4) = 5 f. |x| - (-2) = (-1) g. 5 - |x + 1| = 30 h. |x - 1| - x + 1 = 0 i. |2 - x| + 2 = x j. |x + 1| = |x - 2| k. 5 - |2x - 1| = (-7) l. |x + 2≤| 5 m. |x - 1| > 2 n. |x| = |23| và x < 0 o. |x| = |-2| và x > 0 p. (-1) + 3 + (-5) + 7 + … + x = 600 q. 2 + (-4) + 6 + (-8) + … + (-x) = - 2000
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