Question

A shop owner sold 27 books on Friday. This was 9 more than the number of books he sold on Thursday. Identifyan equation and its solution that shows the number of books he sold on Thursday.

Answer 1

Given:

A shop owner sold 27 books on Friday.

This was 9 more than the number of books he sold on Thursday.

Let, the number of books shop owner sold on thursday is x .

The eqaution is given as,

`27=9+x`

Now, solve the equation,

`\begin{gathered} 27=9+x \\ x=27-9 \\ x=18 \end{gathered}`

Answer: the number of books sold on thursday is 18.