Let [tex]y[/tex] be bags of chips and [tex]x[/tex] bottles of Gatorade.
The system of linear equations emerges.
[tex]3y+2x=7.35[/tex]
[tex]x=1.8[/tex]
Insert value of x from second equation into first to get rid of the system and get:
[tex]3y+2(1.8)=7.35[/tex]
Now solve for y.
[tex]y=\frac{7.35-2(1.8)}{3}=1.25[/tex].
A bag of chips costs $1.25.
Hope this helps.