Solve each system by graphing. check your solution.

11)y=1/2x+7

17)2x-y=-5
-2x-y=-1

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?

Ill mark the brainliest if you me with the these three questions 7,8,9

2x minus y equals 6, x plus y equals negative 3