Question

The linear equation is that f=9÷5×c+32 that convert Fahrenheit to celsius. When Fahrenheit is equal to Celsius

Answer 1

F = (9/5)C + 32

=> F - 32 = (9/5)C

=> (5/9)[F - 32 ] = C

=> C = (5/9)[F - 32]

Now ,

if F = C

=> C = (5/9)[C-32]

=> 9C = 5(C-32)

=> 9C = 5C - 160

=> 9C - 5C = -160

=> 4C = -160

=> C = (-160)/4

=> C = -40°

••••

Answer 2

Answer:-

Example:- c = 20

= f= 9/5×20+32

f= 9×4+32

f= 36+32

f= 68°f