Answer:
x = 9
Step-by-step explanation:
[tex] {9}^{6} = {x}^{3} \times {9}^{3} [/tex]
[tex] {9}^{6} = 729 {x}^{3} [/tex]
[tex] {x}^{3} = \frac{ {9}^{6} }{ {9}^{3} } [/tex]
[tex] {x}^{3} = {9}^{3} [/tex]
[tex] {x}^{3} = 729[/tex]
[tex]\boxed{\green{x = 9}}[/tex]
