Weight of the dog in question = 44 pounds
Amount of weight the dog needs to reduce as per the veterinarian = 7 pounds
Let us assume the new weight of the dog in question = x
Then
44 - x = 7
This equation can also be represented as
x + 7 = 44.
So from the above deductions we can say that 44 - x = 7 is the correct equation. Another equation to represent the situation given in the question is x + 7 = 44