Hello, Venus,
Translate the words into numbers:
"6 is subtracted from five times a number"
We'll set the "number" as "x."
"five times a number" becomes 5x
"6 is subtracted from" is -6
"result is 9" means = 9
Put them together:
5x-6=9
Add 6 to bth sides
5x = 15
Divide both sides by 5
x = 3
I hope this helps,
Bob