HELP ME!! URGENT!! I HAVE A HUGE TEST TOMORROW PLS!!!

Question

The equation C=5/9(F-32) is used to convert temperature from Fahren to Celsius. F is fahrenheit and C is Celsius. Which of the following is NOT an equivalent form of the conversion formula?? 

 

The options to choose from are

F= 9/5(C+32) 

-9/5C+F=32

9/5C+32=F

C=5/9F-160/9

 

 

Pls explain because I have no idea how to figure it out.

Answer 1

 9/5C = F - 32 <--- multiplies both sides by 9/5

 

 9/5C + 32 = F  <--- adds 32 to both sides