求圆(x+1)^2+(y-3)^2=24关于直线y=x对称的圆的方程做这类题有什么普遍方法（取点除外）?请用这道题做个例子解答.

(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 已知：2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x) 已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙 x*y=6x-y=1求X Y是多少?X=3 Y=2 求公式! 求导数y=3x-x^2 求y',y'/ x=1 y'/x=0 已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 1奥数题x-2y/x+2y=3,求x-2y/3(x+2y)-3(x-2y)/x-2y的差 2分之x+2y=3分之2x-y=1求x，y 2y=x-3 y+2=2x-1 求x y 2x+4y=3 -3x-2y=1 ..求x和y 2x+y=3,3x+2y=1【求X.Y】 1/x-1/y=3,求2x+3xy-2y/x-y 1、若x^2+y^2=5,xy=3,求(x+y)^2 （x-y）^2 2、x^+y^=5,x+y=6,求xy 3、若x+y=6,xy=3,求x^2+y^2 (x-y)^21、若x^2+y^2=5,xy=3,求(x+y)^2 （x-y）^22、x^+y^=5,x+y=6,求xy3、若x+y=6,xy=3,求x^2+y^2 (x-y)^24、a+b=5,a-b=3,求ab -2x+3y=3x-2y+1求x.y的大小关系