Answer: 4*X - 6
Step-by-step explanation:
Let's decompose the phrase:
"six less than..." means that we subtract 6 to a number.
"The product of four and a number X" is 4 times a number X, so this is 4*X, so here we must subtract 6 units to this number, then, the phrase can be written as:
4*X - 6
