10*0.75 + 10*x [tex] \leq [/tex] 50
This is how our inequality looks where x represents items cost per bag.
10*x [tex] \leq [/tex] 42.5
x [tex] \leq [/tex] 4.25.
Marcus can spend $4.25 at most per bag.
The money he spent on buying bags we can calculate right away because we know how much one bag costs and how many bags he bought.