Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Bethany is working at the front desk at Joe’s Gym. There were some people lifting weights when she started her shift. Then 5 more people came in and started running on the treadmill and 2 people left. There are now 19 people in the gym. How many people were lifting weights at the start of Bethany’s shift?

### Response:
 Tunajua watu 5 waliingia na watu 2 waliondoka baada ya Bethany kuanza zamu yake, hivyo kulikuwa na mabadiliko ya jumla ya watu 5 - 2 = <<5-2=3>>3.
Ikiwa kuna watu 19 sasa katika gym na hiyo ni watu 3 zaidi ya wakati Bethany alianza zamu yake, tunajua kulikuwa na watu 19 - 3 = <<19-3=16>>16 wakibeba vitu wakati alianza zamu yake.