3. What is the value of the expression below when $x=-7$ and $y=3$ ? Show the substitution.
\[
-3 y-x
\]

Answer

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Answer

Final Answer: The value of the expression $-3y - x$ when $x = -7$ and $y = 3$ is $\boxed{-2}$.

Steps

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 $\boxed{-2}$.