- Johanna was saving up for a used bicycle that cost $225. She had $25 and determined to save $15 per week. How long would it take her to have enough money to buy the bike?
- The soccer team sold tee shirts, one selling for $15 and the other for $25 and made $7800. They sold twice as many $25 tees as they sold the $15 tee. Find the number of each that they sold.
- Solve \(ax + by = c\) for \(y\).