Answer:
ºC = (ºF - 32) / (9/5)
Explanation:
Take the formula that you already have:
ºF = (ºC × 9/5) + 32
Flip the ºF and ºC:
ºC = (ºF × 9/5) + 32
Move the whole number to the right side of the equation and change it's sign:
ºC = (ºF - 32) / (9/5)
(This will also force the fraction to move to the right hand side of the equation, but for that you keep the value of the number the same)
Hope this helped!