$${2}=x+{1\over{1+{1\over5+{1\over{2}}}}}$$ then the value of x is equal to:

Evaluate the following:
5 - [96 ÷ 4 of 3 - (16 - 55 ÷ 5)]

 If $${1\over 4.263}=0.2346$$, find the value of $${1\over0.0004263}.$$

The value of $$5-{8+2\sqrt{15} \over4}-{{1}\over8+2\sqrt{15}}$$ is equal to:

  $$25\% \ of (50\% \ of \ 30\% \ of \ 150)\over 40\% of \ 2250$$ is equal to:

The value of 4÷12 of [3÷4 of {(4-2) x 6÷2}] -2x6÷8+3 is:

The value of $${0.7×0.7×0.7+0.3×0.3×0.3}\over {0.7×0.7-0.7×0.3+0.3×0.3}$$ is

Find the value of the given expression.

$$ \sqrt { 20-{ \sqrt { 20- \sqrt { 20- \sqrt { 20- .....∞}}}}} $$