若3x-7y=0,则x-y/y=?

若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 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=___. （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 若3x=7y,则y比x= ,x:（x+y）= 若4x-3y=0(y不等于0)则x+y/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3x-7y=0,则x-y/y=? 若x,y为正整数,且满足3x(x+y)-y(x+y)=7,求x,y 分式 4y-3x+0 ,则(x+y):y=若 4y-3x+0 ,则(x+y):y=若 4y-3x=0 ,则(x+y):y= 若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=? 若x,y满足|x-y+1|+(x+y+3)^2=0则x^2-y^2= 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 7y(x-3y)-2(3y-x)=0 .x=?,y=? 若3x=5y,则x:y=________,(x-y):y=______ 若x+3y=3x+2y=7,则x+y=几?