The formula is give as
F = 9C/5 + 32
To slove for C, the first step is to subtract 32 from both sides of the equation. It becomes
F - 32 = 9C/5 + 32 - 32
F - 32 = 9C/5
9C = 5(F - 32)
Dividing both sides of the equation by 9, it becomes
9C/9 = 5(F - 32)/9
C = 5(F - 32)/9
