Answer :

Sure, let's solve the problem step-by-step.

### Problem:
We want to find the expression for "7 less than fifteen times a number."

### Step-by-Step Solution:

1. Identify the unknown number:
Let the unknown number be represented by [tex]\( x \)[/tex].

2. Expression for fifteen times a number:
Fifteen times the unknown number can be written as [tex]\( 15x \)[/tex].

3. Expression for 7 less than fifteen times a number:
Since you want to find a value that is 7 less than a given expression, you subtract 7 from it. Therefore, the expression is:
[tex]\[ 15x - 7 \][/tex]

### Final Answer:
The expression for "7 less than fifteen times a number" is:
[tex]\[ 15x - 7 \][/tex]

This expression represents any number [tex]\( x \)[/tex] multiplied by 15 and then decreased by 7.