8x+3y+2=o,4x+5y+8=0

8x+3y+2=o,4x+5y+8=0 5x-8y=o,则(x+3y)/(x-3y)=_______ 已知x,y,z满足方程组：4x-5y+2z=o;x+4y-3x=0,求x:y:z的值 {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 x>0,y>o,x+2y+4xy=8,xy的最小值是多少 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian X+Y-8X+10Y+41=O,求X/Y-Y/X的值 解下列方程组：{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 X^2+2xy-y^2+3x-4y+9=0 x^2+4xy-2y^2-5x-8y+8=o解方程 已知X+4Y-3Z=0,4X-5Y+2Z=0,则X:Y:Z=___________?谢谢o(∩_∩)o y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值 2x²-3xy=y²=0（x,y不得o）求x/y+y/x 已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z x+y=5,2x+y=8,x-2y=0,3x+2y=8 3(2X+Y)+(2(2x-Y)=6 (8X+4y)-(10X-5Y)=2 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 方程组x-2y=8,3x-4y=5,x=?,y=?