If 9 root X = root 12 + root 147, then X = ?

9 root X = root 12 + root 147
 or 9 root X = root 4 X 3 + root 49 X 3

or 9 root X = 2 root 3 + 7 root 3 = root 3(2 + 7)

or 9 root X = 9 root 3

X = 3