x+5y=4 3x-6y=5 求x ,y

已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x+5y=4 3x-6y=5 求x ,y 5x-6y= -28 ,3x+4y=6求x与y 已知3X=4X,5Y=6Z求X+Y：Y+Z 已知：4x = 5y,求(x+y) ：y (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 6X+3Y=5(X+Y)求结果 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 6x+5Y=31 2X+3Y=17求X求 Y |x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 3y=18-5x 3x=4+5y 求x,y 6x-2y=5 8x-3y=-5 求x,y 6x+5y+3z=100 x+y+z=30 求 x y