Question

Isabella purchased 3 books from the book store. She now owns 11 books that she wants to read before the end of the year. If x represents the number of books she started with, which equation could be used to determine the value of x?

A.) x-11=3
B.) x+11=3
C.) x+3=11
D.) x-3=11

Answer 1

She started with x books. She purchased 3 more.

Add the two amounts (x and 3) to find out the number of books she has now.

Now she has x + 3 books.

We are told she now has 11 books, so x + 3 must equal 11.

The equation is x + 3 = 11

Answer: C.) x + 3 = 11