若xyz≠0且4x-5y=-2z,x+4y=3z,求x：y：z

若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z 若xyz≠0且{4x-5y+2z=0 x+4y-3z=0 ,求x：y：z. 若xyz≠0且4x-5y=-2z,x+4y=3z,求x：y：z 若1/2x=1/3y=1/4z,且xyz≠0,求xyz最后一段为“求x:y:z” 若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值 若x+y除以3=y+z除以5=z+x除以4,且xyz≠0,则x:y:z=? 若xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求x:y:z 若xyz不等于0,且4x-5y+2z=0,x+4y-3z=0,求x：y：z的值. 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 若4x-3y-6z=0,x+2y-7z=0且xyz≠0； 求(2x+3y+6z)/(x+5y+7z)的值? 若xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求31x+19y-23 已知 (x+y-z)/z=(x-y+z)/y=(y+z-x)/x,且xyz≠0,求代数式 ((x+y)(y+z)(x+z))/xyz (x-3y+z)^2+/ 5x-4y+z/=0 且xyz≠0 xy+yz+zx/x^2+y^2+z^2(x-3y+z)^2+/ 5x-4y+z/=0 且xyz≠0 求：xy+yz+zx/x^2+y^2+z^2 已知4x-5y+2z=0,x+4y-3z=0 且xyz不等于0,求x:y:z的值. 若3分之x+y=5分之y+z=4分之z+x,且xyz不等于0,则x：y：z= 已知xyz不等于0,且x/3=y/4=z/5,求【2x-3(2y-z)】/x+y+z 已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少 若（x+y）/3=（y+z）/5=（8+z）/4,且xyz≠0,求x∶y∶z.若（x+y）/3=（y+z）/5=（8+z）/4且xyz≠0,求x∶y∶z.