已知3x-4y=2,则10-6x+8y=
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知x,y为实数,根号3x+4 +y^2-6Y+9=0则x+y=?
已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
已知2x/y+3y/x=-5,则4x^2+10XY+6Y^2/2X^2+3Y^2=
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
已知x-2y=3,则(2x+y-6)/(3x-y-9)=?
已知:x²y²-2x+6y+10=0则x+y=
已知x-2y/2x+3y=3/4,则x:y=
已知2x-3y=1,则10-4x+6y=
已知2x-3y=1,则10-4x+6y等于多少