If ` x : y = 3 : 4 and y : z = 6 : 11," then find " x : y : z`.

If 2x = 3y = 4z, find x:y: z.

If (x + y)/2 = (y+z)/3 = (z + x)/4 , then find x : y: z .

If x/5 = y/6 = z/11, then find the value of (x + y + z)/z?

Find the angle between the planes : (i) 3 x - 6y - 2z = 7 " " 2x + y - 2z = 5 (ii) 4 x + 8y + z = 8 " " and y + z = 4 (iii) 2 x - y + z =6 " " and x + y + 2z = 7 .

If (x,y,z) is the solution of the equations x - y - 2z = 3 2x + y + 4z = 5 4x - y - 2z = 11 then the value ofy equals

2x + 3y + z = 11, x + 2y + z = 8, x-y + z = 2

If x(x+y+z) =4, y(x+y+z)=16 and z (x+y+z)=29 and x, y & z are positive numbers. Find x, y & z=?