若2x-5y=0,则y：x

若3x-5y=0,则x+y/x=（）,x-y/y=（）,2x-3y/2x+3y=( ) (5)若x/2=y/3(y不为0）则x/y=____,x+y/y=___,y/x-y=___. 若2x-5y=0,则y：x 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 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 若|x+y-3|+(x-y-5)^2=0,则x)^2-y^2= 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若|2x-y+5|+(x+2y-4)的平方=0,则（2x-y)的三次方-（x-3y)(y-2x)的平方 若x,y互为相反数（y≠0）,则2x+5+2y+3x/y=____ 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 若2x-5y=0,则y:x= 多少,(x+y)除以x=多少. 若|x-2y+1|+|x+y-5|=0,则2^2+y^2 若f(x+y,y/x)=x^2-y^2,则F(X,Y)= 若x+y=1,x不等于0则x+(2xy+y^2)/x/(x+y)/x= （5x-6y)(x+y)=0(x不等于y),则y/x= x*x+2x+y*y-4y+5=0 x= y= 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于