Question

At what temperature (degrees Fahrenheit) is the Fahrenheit scale reading equal to:_____

(a) 3 times that of the Celsius and
(b) 1/5 times that of the Celsius

Answer 1

1. C = 26.67° and F = 80°
2. C = -20° and F = -4°

Step-by-step explanation:

Find:

1. 3 times that of the Celsius and
2. 1/5 times that of the Celsius

Computation:

F = (9/5)C + 32

3 times that of the Celsius

If C = x

So F = 3x

So,

3x = (9/5)x + 32

15x = 9x +160

6x = 160

x = 26.67

So, C = 26.67° and F = 80°

1/5 times that of the Celsius

If C = x

So F = x/5

So,

x/5 = (9/5)x + 32

x = 9x + 160

x = -20

So, C = -20° and F = -4°