Ziyu Ng's answer to ImNobody's Primary 6 Maths Algebra Singapore question.

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Ziyu Ng
Ziyu Ng's answer
3 answers (A Helpful Person)
1st
since initial amt is $10 and amt left is $y, the amt spent (on 3 identical pens) is $( 10-y)
ImNobody
ImNobody
3 years ago
Ty