1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.

已知x² +y²+5/4=2x+y,求y-x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=2,求2x(x+y)-y(x+y)/4x²-4xy+y² 已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+ 已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/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2x-y=10,求代数式[x²+y²-(x-y)²+2y(x-y)]÷4y的值 1.已知x≠2y,x²-x=4y²-2y,求x+2y的值. 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²的值 已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值 已知x+3y=2,求代数式(x²-y²/x+y)-【2(x+y)】的值 已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y