x/5=6y 则x/y=

（5x-6y)(x+y)=0(x不等于y),则y/x= 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ x+y／y=5／4,则x／y=---------------- (x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5 {6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1 x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 x/5=6y 则x/y= 已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy) 若5x-4y=6,4x-5y=8,则x+y=( ),x-y=( ) 若5x+3y=3x+4y=x+2y+6,则x+y=___ 已知（x+5)+|y*y+y-6|=0,则y*y-5分之一xy+x*x+x*x*x= 已知x+2y=5 2x+y=6 则x-y= 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 已知x+y=6,x-y=5,则x^2-y^2等于多少 （x-y-5）^2+|x+6y+2|=0,则x-y^2= 已知|5x-y-8|+(7y-x+2)=0则4x+6y