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20 November, 20:40

Lisa and Robert have taken the same number of photos on their school trip. Lisa has taken 3 times as many photos as Claire and Robert has taken twelve more photos than Claire. How many photos has Claire taken?

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  1. 21 November, 00:38
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    Let L be the number of photos taken by Lisa, R by Robert & C by clair:

    L=R

    L=3C

    R=C+12 Since L=R then 3C = C+12 = = > 3C-C=12==> 2c = 12 & C=6
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