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2x-y-3=0 x-2y+3=0 2x+y+5=0 x+2y-5=0
x﹣2y+7=0 2x+y﹣1=0 x﹣2y﹣5=0 2x+y﹣5=0
3x+2y-1=0 3x+2y+7=0 2x-3y+5=0 2x-3y+8=0
3x y 5 = 0 3x +y 7 = 0 x +3y 5 = 0 x 3y+5 = 0
x=5.y=一2 ,X=3.,y=一3 x=一4.y=2 x=一3.y=一9
-3x2y·5x2y=2x2y -2x2y3·2x3y=-2x5y4 35x3y2÷5x2y=7xy (-2x-y)(2x+y)=4x2-y2
x-2y-5=0 x-2y+7=0 2x+y-1=0 2x+y-5=0
3a+2b=5ab 2ab-2ba=0 5y2-2y2=3 3x2y-5xy2=2x2y
3x-y-5=0 x+3y-5=0 3x-y-1=0 x+3y-1=0
3x-2y = 0 x + y-5 = 0 2x-3y = 0 或x + y-5 = 0 3x-2y = 0 或x + y-5 = 0
3x-y-5=0 3x+y-7=0 3x-y-1=0 3x+y-5=0
3x-y-5=0 3x+y-7=0 x+3y-5=0 x-3y+1=0
x=3,y=2 x=2,y=3 x=0,y=5 x=5,y=0
(2,3)且垂直于直线2x+y-5=0的直线方程为( ). A.x-2y+4=0 2x+y-7=0 x-2y+3=0 x-2y+5=0
2x+y-1=0 2x+y-5=0 x+2y-5=0 x-2y+7=0
x-2y+5=0 x+2y+5=0 x+3y+5=0 x-3y+5=0
3x+2y﹣1=0 3x+2y+7=0 2x﹣3y+5=0 2x﹣3y+8=0