解四个不等式:1)3x≥2x-2 (2)2-3x≤3-x(3)3x+6-7<4x-4 (4)3-3x<2x+18
人气:325 ℃ 时间:2019-10-19 15:59:59
解答
(1)3x≥2x-2
3x-2x≥-2
x≥-2
(2) 2-3x≤3-x
2-3≤-x+3x
-1≤2x
2X ≥-1
X≥-1/2
(3)
3x+6-7
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