计算｛x:y:z=5:4:3｛x+y+z=24

计算｛x:y:z=5:4:3｛x+y+z=24 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 计算（x+y-z)(x-y-z) 计算：(x-y+z)(-x+y+z) (x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ；3x+y-z=-4求x y z (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? x:y=3:2 y:z=5:4 x+y+z=66 请教结果及计算过程 C++计算x=2,y=3,z=4计算z+=x++||y++||++z求x,y,z的值 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 化简计算 （4y+3x-5z)(3x-4y+5z) 若|x-2|+|Y+3|+|z-5|=O计算求|x|+|Y|+|z|的值 若|x-2|+|y+3|+|z-5|=0.计算x.y.z的值 (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z 3x-y+2z=3 2x+y-4z=11 7x+y-5z=1 用加减消元法,帮我计算 x-y-z=-1,3x+5y+7z=11,4x-y+2z=-1.(解三元一次方程)要有计算过程! x/2=y/3=z/5 x+3y-z/x-3y+z x+y/2=z+x/3=y+z/4 x+y+z=27