2x×2000×﹙1＋x﹚=60000÷2x
人气：402 ℃ 时间：2020-04-11 23:02:01
解答
2x×2000×﹙1＋x﹚=60000÷2x4000X＋4000X²=30000X4000X²-26000X＝04X²-26X＝0 2X²-13X=0X﹙2X－13﹚＝0X＝0或X＝6.5...
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