Pls help to explain the working clearly , thanks

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Primary 4 Maths

Pls help to explain the working clearly , thanks

Date Posted: 7 years ago

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I think u should be able to work from there .The highlighted once are the clue.If you have any question about the question pls comment

Date Posted: 7 years ago

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I used a little bit of Algebra.

Date Posted: 7 years ago