Which algebraic expression represents the statement: the difference of four times a number and seven.

4n - 7

4n + 7

n + 7

n - 7

First, take the written expression apart. Four times a number would be 4n. Then the difference between. That would be a subtract sign. Then finally the seven. The difference between 4n and 7 so:
4n - 7 is your answer.

The correct answer is $90