I believe it's 3 because 4 times 3 equals 12 and 12 plus 8 equals 20!
4(3)+8=20
Hoped this helped! :)
As we know Conversion from fahrenheit to celsius is

We can write it also as

F as y and C as x then we can write it as
2 = 1.313 is the right answer
3 = 24 is the right answer
4 = 27 is the right answer
Set up a x/100 = (14-48)/48 = -34/48 Multiply the cross 48x = -3400 x = 70.8333 so around -70.83% change