Answer:
![3x-5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/62psjsew0zjjsk5847h94meb8cpjthqnhm.png)
Explanation:
"five less than three times x"
The unknown number is x
Three times x means we multiply 3 with x
So the expression becomes 3x
5 less than 3x means we subtract 5 from 3x
To get the expression we use variables and operators like +,- . x or divide
So the final expression becomes
![3x-5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/62psjsew0zjjsk5847h94meb8cpjthqnhm.png)