Given 2x-1 | 3-1 > x-5-3x | 2, find the maximum and minimum of | x + 1 | - | x + 3 |
1、2(2X-1)-6≥6X-3(5-3X)
4X-2-6≥6X-15+9X
11x≤7
x≤7/11
2. When x
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