Solve for the indicated variable u=x-k, for x

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Convert 2000 swiss francs to dutch guilders

What is the value of x in the following equation. -x ^3/2 = -27