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

### Instruction:
Annie brought 20 brownies to school.  She gave half of them to the school administrator to put in the faculty lounge.  Of the remaining brownies, she gave half to her best friend, Carl, and another two to her friend, Simon.  How many brownies did she have left?

### Response:
 Kwanza, alitoa nusu ya mikate yake 20, au 20/2=<<20/2=10>>10 mikate, kwa walimu.
Kisha, aliwapa nusu ya mikate iliyosalia, au 10/2=<<10/2=5>>5 mikate, kwa Carl.
Baada ya kutoa mbili zaidi kwa Simon, alibakiwa na 10-5-2=<<10-5-2=3>>3 mikate.