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Question

need help! thanks in advance ..

Source: CHIJ Primary Toa Payoh

Answer

If Mandy and Mary each received $ u, then Mandy had  $ ( 100 + u ) and Mary had $(420 + u ).

3 ( 100 + u )  = (420 + u )

300 + 3u = 420 + u

2u = 120

u = 60

So each of them received $60.

 

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