若 x/2 = y/2 = z/4 ≠0,则2x+3y/z的值为
若4x=7y+5z,2x+y=z,则x:y:z的值为
若2x+5y-4z=0,3x+9y-7z=0,则x+y-z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
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
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?
已知3x+2y-3z=0 8x-4y-z=0 其中z不等于0,则x:y:z=0,则x:y:z的值为()
若x/3=y/4=z/5,则x+2y+3z/2x的值为
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
x=2,y=-3,z=3则表达式x||y+z&&y-z的值为
若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
5,若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )