Eric Nicholas K's answer to Eileen's Junior College 1 H2 Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
First photo of my two-photo workings

I’m not entirely sure of this explanation, but you can take it cautiously.

If a user called J comes in to read this, he might be able to offer a better explanation.