SOMEONE PLEASE HELP ME ASAP

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

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 i do this? i don’t understand