[tex] \sqrt[4]{8} = \sqrt[4]{ {2}^{3} } = {2}^{ \frac{3}{4} } [/tex]
[tex] \sqrt[3]{ {4}^{x} } = \sqrt[3]{ {2}^{2x} } = {2}^{ \frac{2x}{3} } [/tex]
[tex]{2}^{ \frac{3}{4} } = {2}^{ \frac{2x}{3} } [/tex]
[tex] \frac{3}{4} = \frac{2x}{3} [/tex]
9 = 8x
[tex]x = \frac{9}{8} [/tex]
