Aloysius Yong's answer to Nicole's Secondary 4 E Maths Singapore question.

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Aloysius Yong
Aloysius Yong's answer
18 answers (Tutor Details)
1st
your working is correct! you just missed out multiplying 20 to the other side of the equation as well! remember that when you multiply 20 to an equation it applies to the entire equation and not just the left hand side!