如果x-y= -5,z-x=11,则z-x=____.
(x+y-z)(x-y+z)=
X+Y+Z=?
如果x/2=y/7=z/5,x,y,z都不等于0,则(x+y+z)/(3x-y)等于多少?
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
x/2=y/3=z/5 x+3y-z/x-3y+z
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w)
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
若整数x、y、z满足(9/8)^x*×(10/9)^y*(16/15)^z=4,则x=____ y=____ z=___
若整数x、y、z满足(9/8)^x×(9/10)^y×(16/15)^z=2 ,则x=____ y=____ z=___
如果X:Y:Z=3:4:5,且2X+3Y-5Z=-14,则X= Y= Z=