Answer:
Equation is x-5 = 37
Reason:
x = starting temperature
We start with x degrees, and decrease by 5 degrees.
We go from x to x-5
The x-5 is now 37 degrees
Therefore, we arrive at the equation x-5 = 37
To solve this equation, add 5 to both sides and you'll get x = 42
Nice work on getting the correct value of 42.