-9x+6y=18 on an graph due at 11:59 pm!!

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?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

State if the two triangles are congruent. if they are, state how you know?