Posted by Delia on Tuesday, May 21, 2013 at 7:37am.
Nora had 20% fewer pictures than Maria. After Nora gave 12 pictures to Maria, she had half as many pictures as Maria. How many pictures did Nora have at first?

Math  Steve, Tuesday, May 21, 2013 at 11:11am
n = .8m
n12 = .5(m+12)
(m,n) = (60,48)
Nora had 48
Maria had 60
Later, Nora had 36 and Maria had 72
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