若xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求31x+19y-23

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. 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xyz不等于0,且{4x-5y+2z=0,x+4y-3z=0,求31x+19y-23 若xyz不等于0,且(y+z)/x=(z+x)/y=(x+y)/z,求(y+z)(z+x)(x+y)/xyz的值? 若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求（y+z)（x+z)（x+y)/xyz的值 若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求（y+z)（x+z)（x+y)/xyz的值 若1/2x=1/3y=1/4z且xyz不等于0,求x:y:z快者+5 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 已知4x-5y+2z=0,且x+4y-3z=0,(xyz不等于0）试求x/y 已知4x-5y+2z=0,且x+4y-3z=0,(xyz不等于0）试求x/y 初二比例线段及性质的题若 X/2 = Y/3 = Z/5 ,且XYZ不等于0,则X+Y+Z/3X-Y = 若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值? 已知xy/5=y+z/6=z+x/7,且xyz不等于0,求x:y:z 若xyz不等于0,且|2x+3y-z|+(3x-y-z)^=0,则代数式z分之x+y=