1.若x+3y+2z=10,求正整数x、y、z
x+2y+3z=9,求正整数x、y、z
若x,y,z,满足3x+2y+z=5,2x+y-3z=1.y是非负数.求z的取值范围
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y)
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求
已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求
已知:2^x*3^y*37^z=1998,x,y,z为正整数.求[(x-y+z)^2006]^2007的值
求方程组 {x+y+z=12,x+2y-3z=2}的正整数解
求方程组x+y+z=7,2x+3y+4z=20的正整数解
求方程组x+y-z=1,2x+3y-z=13的正整数解
已知3x+2y=4+z,2x+2z=6+y,问是否存在x、y、z的正整数值,使得x+y+z