Find the equation wherein the number on the left side of the equation is also the number on the right side of equation.

Question

Observe the following equations.
55 = 131
90 = 194
-35 = -31
10 = 50
-50 = -58
In this sense, find the equation wherein the number on the left side of the equation is also the number on the right side of the equation. (a=a)

Answer 1

this follows conversion of Celsius to Fahrenheit
F=(9/5)*C+32
and the answer is -40=(9/5)*(-40)+32 so -40 is the answer.

Answer 2

-40 = -40.
The first number is the temperature in Celsius while the second one is the temperature in Fahrenheit.
For the hint: Do you feel SICK keeping on solving?
SICK gives a clue to FEVER, leading you to think of TEMPERATURE.