Question

at what temperature Celsius and Fahrenheit is equal. prove with a formula

Answer 1

Now according your question

C = F
We know F = 9/5× C + 32
So F = C so we can write C in place of F
C = 9C/5 + 32
C - 9C/5 = 32

(5C - 9C)/5= 32
-4C /5 = 32
-4 C = 32 × 5
C = 160
C = 160/ -4
C = -40

So ans. is F = C = -40

Hope it helps you a lot...