Fifteen decreased by six times a number is

15-6x = ?

fifteendiminishedby six

To find the result of the expression "Fifteen decreased by six times a number," you need to perform the following steps:

1. Assign a variable to the unknown number. Let's say the unknown number is "x."

2. Multiply the number "x" by 6. This gives you 6x.

3. Subtract 6x from 15. The expression "Fifteen decreased by six times a number" can be written as 15 - 6x.

The final expression, "Fifteen decreased by six times a number," is 15 - 6x.