Ineed to know the steps of how they got 1 over 2

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

What does x = in this equation x+3+2x=x+5

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