Question 346652
"Andy has 30 coins made up of quarters and half dollars" means that {{{q+h=30}}} where 'q' is the number of quarters and 'h' is the number of half dollars.


Also, since "their total value is $12.25", this means that {{{0.25q+0.5h=12.25}}} (note: 0.25q is the total amount of money in terms of quarters only and 0.5h is the total amount of money in terms of half dollars only)