At a furniture manufacturer, worker A can assemble a shelving unit in 5 hours. Worker B can assemble the same shelving unit in 3 hours. Which equation can be used to find t, the time in hours it takes for worker A and worker B to assemble a shelving unit together? Rate (Shelving Units per Hour) Time (Hours) Fraction Completed Worker A One-fifth t Worker B One-third t 5 t 3 t = 1 One-fifth t minus one-third t = 1 One-fifth t one-third t = 1 5 t minus 3 5 = 1.