Which expression is equivalent to −3x−5?

The expression that is equivalent to −3x−5 is -5-3x.

To find an expression equivalent to −3x−5, we can simplify it in a step-by-step manner:

Step 1: First, we distribute the negative sign to both terms inside the parentheses:
−3x−5 = −(3x)−(5)

Step 2: Multiplying −1 to each term inside the parentheses, the negative sign changes to positive:
−(3x)−(5) = -3x + (-5)

So, an expression equivalent to −3x−5 is -3x + (-5).