 
 <translate> Question: Bernie has a collection of 18 unique postcards. He decided to sell half his collection for $15 per postcard. After he has successfully sold his postcards he decided to spend all the earned money to buy new postcards for $5 each. How many postcards does Bernie have after all his transactions? Think carefully first, then make a decision: <hau> Tambaya: Bernie yana da tarin katin gaisuwa guda 18. Ya yanke shawarar sayar da rabin tarin da yake da shi a dala 15 ga kowane katin gaisuwa. Bayan ya sayar da katunan gidan waya da ya samu nasara sai ya yanke shawarar kashe duk kuɗin da ya samu don siyan sabbin katunan gidan waya a dala 5 kowanne. Katunan gidan waya nawa ne Bernie yake da su bayan duk ma'amalarsa? Ka yi tunani sosai da farko, sannan ka yanke shawara: 