(2x+3y)除以(5x-3y)=3/5求x比y
(2x+3y)除以(5x-3y)=3/5求x比y
已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知x-y除以x+y=3,求代数式x+y分之2(x-y)-3(x-y)分之x+y的值.
已知xy除以x+y=2,求代数3x-5y+3y除以-x+3xy-y的值?
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x
[(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(