计算X+2Y+3Z=10X+2Y+3Z=104X+3Y+2Z=15求x+y+z=?

计算X+2Y+3Z=10X+2Y+3Z=104X+3Y+2Z=15求x+y+z=? 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z X=3z X+y+z=12 X+2y-2z=10 2x+z=10 x+y-z=4 3x-y-z=0 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 证明 ：x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 x/2=y/3=z/5 x+3y-z/x-3y+z x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 若x+y+z=3y=2z,则x/x+y+z=? x+2y+3z=23 y-z=5 x+2z=10 C++计算x=2,y=3,z=4计算z+=x++||y++||++z求x,y,z的值 计算：(x+2y^2-3z^3)(-x-2y^2-3z^3)=? 计算：(x-3y-2z)*(x+3y-2z)=? 帮帮忙. 若|x-2|+|Y+3|+|z-5|=O计算求|x|+|Y|+|z|的值