不等式组 大括号第一个组2分之2减x 减去1小于3（x-1）第二个组-2x大于等于x加18（写出过程）
人气：181 ℃ 时间：2019-10-17 07:06:03
解答
第一组：同乘2 2-x-26/7
第二组：-2x>=x+18
-18>=3x
-6>=x
综上无解
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