Respuesta :
To solve this problem, we have to set up an equation. Let the variable x represent the number of books that Dimitrius had before last week.
x - 5 - 3 + 8 = 12
To begin simplifying this equation, lets combine terms on the left side of the equation.
x - 8 + 8 = 12
The -8 and +8 cancel each other out, leaving us with:
x=12
Therefore, Dimitrius had 12 books before last week.
Hope this helps! :)
Answer:
He had 12 books
Step-by-step explanation:
Let x be the number of books he had before last week,
After returning 5 books, remaining books = x - 5,
Again after returning 3 more books, remaining books = x - 5 - 3 = x - 8
After checking out 8 more books,
Final number of books = x - 8 + 8 = x
According to the question,
Final number of books = 12,
⇒ x = 12
Hence, he had 12 books before last week.