2000*x+1600*y+800*z=12200中的X、Y、Z取整数是多少啊!
设X,Y,Z都是整数,满足条件(X-Y)(Y-Z)(Z-X)=X+Y+Z,试证明X+Y+Z能被27整除
(x+y-z)(x-y+z)=
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
X+Y+Z=?
若x+y+z=303x+y−z=50,x、y、z均为非负整数,则M=5x+4y+2z的取值范围是( )
设x、y、z为整数,证明:x^4*(y-z)+y^4*(z-x)+z^4*(x-y)/(y+z)^2+(z+x)^2+(
f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w)
若整数x,y,z满足(98)
1.x+y+z=30,3x+y-z=50,x,y,z为非负数,求5x+4y+2z取值范围.
x+y=91 z+y=63 z+x=46求X,Y,Z各是多少
x+y=40 z+x=50 z+y=60 问 x.y.z是多少?
x y z x+y--- = --- = ---- ----y+Z z+x x+y ,求 z 的值 .求 x+y----