Answer:
, 
Step-by-step explanation:
'less than" signifies that there will be subtraction in the <em>expression</em>
"a number" signals that there is a<em> variable</em> or <em>unknown, </em>so
is used in its place.
"four less than is 385" this means that the <em>variable</em> <em>minus</em>
is equal to 

Now, I don't know if the question calls for this, but you can take this a step further and <em>solve</em> the <em>expression</em>

<em>add</em>
to <em>both </em>sides, to <em>isolate</em><em> </em>the variable, leaving you with:

<em>plz mark me brainliest.</em> :)