4. What is the area triangle WXZ?

What is the value of x? enter your answer in the box. photo attached.

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?

X+y=-4 x-y=2 use elimination with adding and subtraction