[外语类试卷]GRE(QUANTITATIVE)练习试卷20(无答案).doc

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GRE(QUANTITATIVE)练习试卷 20(无答案)1 x-2y=14 x-4y=-8 2 4x-2y=6 -6x+5y=7 3 3x-y= 18 4x=24-6y 4 8(y+x)=12 4x-3y=-22 5 4x-y=63 3y+x=6

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