x+5/3+y+3/2=7 2x-3/5-y-2/3=0 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) 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. 已知3x-2y/x+y=5/3求x；y的值 已知x-3y=0(y≠0)求2x+5y/3x-2y的值 先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y 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. 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值