4/2/3−1/1/3÷2 four and two thirds - one and one thirds divided by two

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]

How do you use the elimination method for this question? explain, because i really want to understand!

The distributive property allows you to say that 3(x − 1) = 3x −