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

### Instruction:
Keiko sent 111 text messages last week. This week she sent 50 less than double what she sent last week. How many text messages did Keiko send last week and this week combined?

### Response:
 Wiki iliyopita: ujumbe 111
Wiki hii: 2(111)-50=172 ujumbe
Jumla: 111+172=<<111+172=283>>283 ujumbe