Final answer:
After paying his $12 share of a $60 bill split between 5 friends, Armando will have D - 12 dollars left, represented by the expression D - 60/5.
Step-by-step explanation:
If a group of 5 friends decide to split a $60 bill evenly, each person will pay $60 divided by 5, which equals $12. So, if Armando has D dollars in his wallet, after he pays for his portion of the bill, he will have D minus $12 remaining. The algebraic expression that represents the amount of money Armando will have after he pays is D - 60/5.