At what temperature is the Fahrenheit scale reading equal to
(a) twice (b) half of Celsius ?

Explanation

To solve the problem of finding the temperature at which the Fahrenheit scale reading is equal to (a) twice the Celsius temperature and (b) half the Celsius temperature, we will use the relationship between Celsius (Tc) and Fahrenheit (Tf) temperatures given by the formula:

\[ Tf = \frac{9}{5} Tc + 32 \]

### Step-by-Step Solution

#### Part (a): When Fahrenheit is twice Celsius

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