What is five times a number less than 18 is equal to 13

Let's say the number is x

5 times a number is 5 times x or 5x

5 times a number less than 18 means 18 decreased by 18 times a number or 18-5x

equals 13

18-5x=13

minus 18 both sides

-5x=-5

divide both sides by - 5

x=1

the number is 1

the phrase is 18-5x=13 where the number is x

5n-18=13 so I think it's n=31