若x=10,y=-3；与x=-32,y=45使方程x/a+y/b=1都成立,则当y=13时,x=?

若／X+Y-9／+（2X-Y+3)=0求X与Y的值 在方程2x-3y=10中,若x与y相等,则x=?,y=? 在方程2x-3y=10种,若x与y相等,则x=＿ y＿ 若xy=3,x²+y²=10,求x+y与x-y的值 若xy=3,x^2+y^2=10,求x+y与x-y的值 若(x+y-5)²与|3y-2x+10|互为相反数,则x,y=? x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 2x-y=0与x+y=10 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 3x=y,y与x成什么比例 若根号x-3y+6与绝对值y-5互为相反数,则x+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 (x+y)(x+y-10)+25=0,且x-y=3,求x,y (x+y)(x+y-10)+25=0,且x-y=3,求x,y 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 化简 x / y(x+y) - y / x(x+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