若三条之线2x+3y+8=0,x-y-1=0和x+ky=0相交于一点,求k值

若三条之线2x+3y+8=0,x-y-1=0和x+ky=0相交于一点,求k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 已知4份之3x+2y=6份x-y+1=5份之2x+y,求x与y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 实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值 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 已知（4x+3y-5）2+|x-3y-4|=0,求x,y之值 已知y=y₁+y₂,y₁与x成正比例,y₂与x-1成正比例,且x=3时y=4；x=1时y=2,求y与x之 已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值 9y=3x-(x-1),4(x+y)-(2x+4)=8y x-2y+3=0 求x^2-(4y+1)x+4y^2+8y x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x、y满足等式3份之2x+y＝4份之3x+2y=1,求代数式2x-3y+7份之x+2y+1的值 已知2x-y=0,求分式【1+（3*y*y*y/x*x*x-y*y*y）】/【1+（2y/x-y）】的值注：x*x*x-y*y*y=（x-y）*（x*x+xy+y*y） {4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 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