已知(4x+3y-5)2+|x-3y-4|=0,求x,y之值
已知(4x+3y-5)2+|x-3y-4|=0,求x,y之值
已知X+Y=-4,怎样求二分之一X+Y-4X-Y+3X+Y-二分之三X+Y+X-Y的值
已知4份之3x+2y=6份x-y+1=5份之2x+y,求x与y的值
已知4x-2y=0,求x-y/3x+2y的值
已知x,y>0 2x+y+3=xy 求5x+4y最小值
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
已知2X+3Y=0,求(5X+4Y)/(3X-2Y)的值
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+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)