Root of a Root: Solving the equation

$\frac{\sqrt{98}}{\sqrt{x}}=7$

$2$

Solve the following exercise:

$\sqrt{\sqrt{81}}=\sqrt[3]{\sqrt{x^6}}$

$x=3$

Solve the following exercise:

$\sqrt{\frac{16}{\sqrt[3]{64}}}=\sqrt{x^2}$

$x=2$

Solve the following exercise:

$\sqrt[5]{\sqrt[]{x^{10}}}=\sqrt{\sqrt{81}}$

$x=3$

Solve the following exercise:

$\sqrt{x^6}=\sqrt{\sqrt{16}}\cdot\sqrt{25}$

$x^3=10$

Solve the following exercise:

$\sqrt{144}=\sqrt[3]{\sqrt[5]{x^{10\cdot3}}}$

$x^2=12$