Predict: I predict that this question is going to be about working backwards.
Read: I think of a number, divide it by 2 and then add 12. If the result is 20, what was the original number?
Clarify: I had nothing to clarify
The Big Question: What number did you think of.
Mathematicians toolbox: I used the strategy of working backwards.
First I knew if I was working backwards I would need to use the invert operations of the equations shone. If the result was 20 I would minus 12, then I would be on 8 then, I would multiply by 2 which would give me 16. So my answer was 16.
Conclusion: In conclusion I used my knowledge of working backwards to get an answer of 16.