just solve it like any other equation you just have to get f by itself.
C= 5/9(f-32). first do the distributive property.
C=5/9f-7/9 then add 7/9 C
C+7/9=5/9F since the 7/9 and C arent like terms you cant combine them so it has to look like that^. next multiply the reciprical- the opposite of the fraction.
C+7/9(9/5)=F