tim cac so x,y,z biet x -1 phan 2 bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50
Tim cac so x,y,z biet x/y=9/7; y/2=7/3 va x-y+z=-15
Tim cac so x,y,z biet \(\frac{x}{5}=\frac{y}{7}=\frac{z}{3}\)va x2 va y2 va z2
Tim cac sox y z biet x-1/2=y-2/3=z-3/4 va x-2*y+3*z=14
tim cac so x y z biet 4x bang 6y bang 8z va x-y bang 2
tim x, y, z, biet 4.x=6.y=12.z va x+y+z=30
tim cac so x,y,z thuoc Q biet rang (x+y):(5-z):(y+z):(y+9)=3:1:2:5
Tim cac so nguyen x,y,z biet
x(x+y+z)=-5
y(x+y+z)=9
z(x+y+z)=5
Tim x,y,z biet (x-1)/2= (y+3)/4 =(z-5)/6 va 5z-3x-4y
