#1) At what temperature are the Fahrenheit and Celsius temperatures exactly equal?

In order to answer this question, I set the following equal:
(the asterisk represents the degree sign)
*F = 1.8 (*C) + 32
*C = ((*F)  32)/1.8
1.8 (*C) + 32 = ((*F)  32)/1.8
1.8 (*C) = *F
And I know this is incorrect. Please tell me how to do this.
#2) At what temperature are the Fahrenheit and Celsius temperatures the same value but opposite in sign?

I have no idea how to do this one let alone the previous one. please help.