I'm not entirely positive about it but I think it might be N=CxP..
3/4 is equivalent (equal) to 9/12 only if the product of the numerator (3) of the first fraction and the denominator (12) of the other fraction is equal to the product of the denominator (4) of the first fraction and the numerator (9) of the other fraction.
Answer:
-22oC
Step-by-step explanation:
I hope you mean -22 degrees Celsius, because that almost tricked me. 4'C -22'C is equal to -18'C, so that means C is the answer.