已知;2y-x= —3,求 [4y(2x - y) - 2x(2x - y)]÷(2x-y)的值.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知2/x+2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
已知2/x 2/y=根号24,求 x/y(x-y) - y/x(x-y)的值
已知y-2x=10,求[2y(x-y)-(x-y)2+(x+y)2-2xy]÷4y的值.
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
已知4x-2y=0,求x-y/3x+2y的值
已知3x-4y/2x+y=1/2 求x/y的值
已知x/y=3/4,求2x-y/x+y的值.