已知2x-3y+5x+2y=1求x,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1/x+1/y=5,求(2x-3y+2y)/(x+2xy+y)的值 已知3x-2y/x+y=5/3求x；y的值 已知3x-4y/2x+y=1/2 求x/y的值 已知|2x-3y|+|3x-y-1|=0,求x,y的值. (1)已知x+y=6,x²-y²=5,求x-y的值（2）若x+y=3,x²+y² 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值 1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值 已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值. 已知X/Y=5/3,求X/(X+Y)+X/(X-Y)-Y*2/(X*2-Y*2)的值.