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

### Instruction:
A couple's wedding reception had 180 people. The bride and groom had each invited 20 couples from their side of the family. The remaining guests were friends. How many friends attended the reception?

### Response:
 Kutoka upande wa bibi harusi, wanandoa 20 * wageni 2/wanandoa = <<20*2=40>>40 wageni walihudhuria
Kutoka upande wa bwana harusi, wanandoa 20 * wageni 2/wanandoa = <<20*2=40>>40 wageni walihudhuria
Hivyo kulikuwa na wageni 180 - (wageni 40 + wageni 40) = 100 marafiki waliohudhuria sherehe