Show ALL work or explain in details the correct solution: How is the sentence "9 less than x is –1" written as an equation?

Question

I know the answer is x – 9 = –1. I need help with the "Show ALL work or explain in details the correct solution" part.

Answer 1

"less than" indicates a subtraction. For example, 3 is 6 less than 9: 9-6
So,
9 less than x ... x-9
"is" ... =
get it now?

Answer 2

I do. Thank you very much oobleck!