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