Tim x,y,z biet x-y+z=x/(y*z)=y/(z+x)=z/(y-x)
tim x,y,z biet; x/z+y+1=y/x+z+1=x+y-2=x+y+z
Tim x, y, z biet x, y, z > 0 , x-y/z = y-z/x = z-x/y va x+2y+3z=30
tim x;y;z biet x(x+y+z)=2; y(x+y+z)=25; z(x+y+z)=-2; x>0
Tim x , y , z biet: x /y+z+1 = y/ z+x+2 = z/ x+y−3 =x+y+z Cach lam ho minh voi
tim x,y,z biet y+z+1=x+z+2/y=x+y-3/2=1/x+y+z
Tim x,y,z biet
X+y+2005/z=y+z-2006/x=x+z+1/y=2/x+y+z
tim z,y; z biet
x(x+y+z)=-12
y(x+y+z)=18
z(x+y+z)=30
Tim cac so nguyen x,y,z biet
x(x+y+z)=-5
y(x+y+z)=9
z(x+y+z)=5
