Jenny had 420 more paper clips than Lily. After Jenny gave 67 paper clips to Lily, Jenny still had 3 times as many paper clips as Lily. How many paper clips did each of them have at first ?
Solution:
Draw model
From the After Model picture, we can have
2u + (4 x 67) = 420
2u = 420 - 268 = 152
u = 76
Hence at first:
Jenny had (u + 420) = $496
Lily had u = $76
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