Alex and Jamie work for a landscape company during the spring and summer. When Alex works alone, it takes him 5 hours to complete a spring clean-up in a yard. When Alex and Jamie work together, it takes them 3 hours to complete a yard.
a. Define a variable to represent the time it takes Jamie to complete a yard alone.
b. Write an equation to represent the time it takes Alex and Jamie to complete a yard together.
c. Solve the equation to determine the time it takes Jamie to complete a yard alone.