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最佳答案:2x+3y=9------(1)3x-2y=-2------(2)(1)*3+(2)*2:13x=12,x=12/13.24/13+3y=9,y=31/13.x
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最佳答案:4x—5y=5·······a2x+3y=—25······bbx2得4x+6y=-50·····cc-a得11y=-55y=-5x=-5