Question

solve the formula 9/5c + 32=f for c and use the resulting formula to find the tempeture in degrees celsius when the fahrenheit tempeture is 77

Answer 1

9c/5+32=f

(9c+160)/5=f

9c+160=5f

9c=5f-160

c=(5f-160)/9

c(77)=(5(77)-160)/9

c(77)=25°

Answer 2

9/5c + 32 = f
9/5c = f - 32
c = 5/9(f - 32) <==

when f = 77
c = 5/9(77 - 32)
c = 5/9(45)
c = 225/9
c = 25 <==