Lisa spends part of her year as a member of a gym. She then finds a better deal at another gym, so she cancels her membership with the first gym after x months and spends the rest of the year, y months, with the second gym. The membership to the first gym cost $60, while the membership for the second gym cost $45. She ended up spending a total of $690 over the course of the year. "Drag and drop the numbers into the correct boxes to complete a system of equations to represent the situation.