x/2-3y=0 y+4z=0 (y≠0)则x/2的值为()
若5分之x=4分之y=3分之z(z不等于0),则3x-2y分之x+y+z的值为
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知方程组(4x-5y+2x=0和x+4y-3z=0)则x:y:Z的值为
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求(3x*x+y*y+4z*z)/(5x*x+y*
若x,y,z均为实数,且(x-1)²+|y+2|+根号(z-3)²=0则x,y,z的值分别为?
若x/2=y/3=z/4≠0,则(2x-y+4z)/3y的值为_______.
已知x=3y,z=7y(x≠0),求代数式2x+3y-z分之x+y+z的值
已知X,Y,Z满足|3X-2Y+Z|+|2X+Y+2Z|=0(X,Y,Z≠0),求(X+Y)/Z的值
已知x,y,z同时满足方程x+3y-5z=0和2x-y-3z=0,则x:y:z的值为() A.2:
已知4x-3y-6z=0,x+2y-7z=0,且x、y、z都不为0,求(3x+2y+z)/(x+2y+3z)的值 快帮求
已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值
若2x+5y+4z=0,3x+y-7z=0,则x+y-z的值等于( )