若|x-1|+|y+2|+|z-3|=0,求(x+1)(y-2)(z+3)的值.
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知|x+(-2)|+|y+3|+|z|=0,求x+y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知有理数x,y,z,且|x-3|+2|y+1|+7(2z+1)2=0,求x+y+z的相反数的倒数.
(1)已知3x=2y=z,求2x+y-z分之x-y+2z的值.(2)若(x+y):(3x-2y)=5:2,则x:y=?
已知X Y Z满足3x-2y+z的绝对值+2x+y+2z的绝对值=0(x,y,z不等于0),求x+y除以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
1、已知x/2=y/3=z/5≠0,求(x-2y=z):(z-3x)的值
已知|x-8y|+2(4y-1)2+3|8z-3x|=0,求x+y+z的值.
若有理数x,y,z满足等式:(x-1)的平方+(2x-y)的平方+|3x-z|=0,求x+y+z的值