F= 9/5-62+32

Answer 1

maybe

F = (9/5) C + 32

to convert to Fahrenheit from Centigrade?
Are you trying to get there from the usual two points, freezing and boiling of water?
0 C = 32 F
100 C = 212 F

F = m C + b
32 = m (0) + b
b = 32
F = m C + 32
212 = m (100) + 32
180 = 100 m
m = 180/100 = 9/5
so indeed
F = (9/5) C + 32

Answer 2

You mean

F=(9/5)(-62)+32

so, get out your calculator and run the numbers