｜2x-3｜+｜3y+2｜=0 求x-y=?义：2x-3的绝对值加上3y+2的绝对值等于0,求x-y等于多少?

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y) (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y y=3(x-y),x=2(x-y)求x,y的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 已知:3x-5y=0,求x/y,x-y/y,x-y/x 求导数y=3x-x^2 求y',y'/ x=1 y'/x=0 已知x-3y=0,求（2x+y)/(x^2-2xy+y^2)*(x-y)的值已知x-3y=0,求（2x+y)/(x^2-2xy+y^2)*(x-y)的值 若根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 若x+y+3=0,求2/3-2x-2y+(-x-y)^2 |3x-y+5|+(2x-y+3)²=0 求x=?y=? 若2x-3y=0,求5x+4y/3x-2y