Lesedi la Sekepe se bonesa makgetlo a le 255 mo metsotsong e le 5. Go tla tsaya nako e e kana kang gore lesedi le bone makgetlo a le 459?

Anna is trying to buy books for her local library. She had a budget of $16, and she has already spent $4. She also bought 2 books today, and both books cost her the same amount of money. If Anna has $2 left in her budget, how much did each of the books cost?
Lesedi la Sekepe le bonesa makgetlo a le 255 / 5 = <<255/5=51>>51 ka motsotso.
Go tla tsaya metsotso e le 459 / 51 = <<459/51=9>>9 gore lesedi le bone makgetlo a le 459.
#### 9 

Anna had already spent some money, so she started the day with $16 – $4 = $<<16-4=12>>12.
She has money left in the budget, so she spent a total of $12 – $2 = $<<12-2=10>>10 on the books.
Therefore each book cost her $10 / 2 = $<<10/2=5>>5.
#### 5