Step 1 :The question is asking for the value of the expression \(-3y - x\) when \(x = -7\) and \(y = 3\).
Step 2 :Substitute the given values of \(x\) and \(y\) into the expression: \(-3(3) - (-7)\).
Step 3 :After simplifying, we find that the value of the expression is -2.
Step 4 :Final Answer: The value of the expression \(-3y - x\) when \(x = -7\) and \(y = 3\) is \(\boxed{-2}\).