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解方程17-2x+1=5，1/2=3x-1，4x-3（20-x）=3，6x+4/3=4x+5/4

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3 | 2011-11-14 18:09:53 | 显示全部楼层 |阅读模式

17-2x+1=5-2x = 5 - 18-2x = -13x = 13/21/2=3x-13x = 1/2 + 13x = 3/2x = 1/24x-3（20-x）=34x - 60 + 3x = 37x = 3 + 607x = 63x = 96x+4/3=4x+5/46x - 4x = 5/4 - 4/32x = -1/12x = -1/24...

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千问 | 2011-11-14 18:09:53 | 显示全部楼层

17-2(x+1)=5，17-2x-2=5-2x = 5-17+2 = -10x=51/2=3x-1，-3x = -1-1/2 = -3/2x = 1/24x-3（20-x）=3，4x-60+3x=37x=3+60=63x=96x+4/3=4x+5/46x-4x=5/4-4/3 2x = (15...

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