Entering numerical values for y, one is able to identify values for z as shown in the table below. Graphing the equation and tracing the line, one is able to determine that there are two distinct solution. The oldest daughter would be either 10 or 20. The middle daughter would be either 5 or 10. The youngest daughter would be 1 or 4.
Technology allows students to see the solution rather than just arriving at an answer.
Students benefit from the technology being used as a problem-solving tool because it allows for them to further their understanding of the concept.