x-3y=0,求2X+5Y\3X-2Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
|3x-y+5|+(2x-y+3)²=0 求x=?y=?
x-3y=0,求2X+5Y\3X-2Y
若2x-3y=0,求5x+4y/3x-2y
已知x,y>0 2x+y+3=xy 求5x+4y最小值
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y)
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
已知x-3y=0(y≠0)求2x+5y/3x-2y的值