Question

What must be the temperature m Fahrenheit so that it will be twice its value in Celsius?

Answer 1

`F = 9/5  C + 32`

We are given that the Fahrenheit temperature should be twice the Celsius temperature: F = 2C

`2C = 9/5 C + 32`

To eliminate the fraction, multiply both sides of the equation by 5:

`5xx2C = 5 xx (9/5C + 32)`

10C = 9C + 160

10C − 9C = 160

C = 160

Now that we know C = 160, substitute this value into the equation F = 2C:

F = 2 × 160

= 320°F