Hari Rabu saya pergi ke Kantor post. Translate to English

what is the right way to cite this? all the info comes from 1 book but different pages. Martin Ka...

Hari has $20. he spends $n. how much does Hari have left? give your answer in terms of n.

Translate in English: waravuze ngo nzakwibutse uyumunsu hari quiz bakoze ndwaye tariki 09/11/2023