3x/2+5y-12=0 5x-4Y/3+14=0 求X和Y

3x/2+5y-12=0 5x-4Y/3+14=0 求X和Y 若2x-3y=0,求5x+4y/3x-2y 已知x,y>0 2x+y+3=xy 求5x+4y最小值 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. |x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少 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* 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=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-( |3x-y+5|+(2x-y+3)²=0 求x=?y=? x-3y=0,求2X+5Y\3X-2Y