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# Can somebody help me with this ratio question

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The ratio of Joe's CDs to Peggy's CDs was 5:3. After Joe gave Peggy half of her CDs, Peggy had 18 more CDs than started with. How many CDs did Peggy get from Joe?

Guest Jun 7, 2017

#3
+77165
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The first guest's answer couldn't possibly be so.....if she increased her collection by 18, she must have gotten 18 from Joe.....

CPhill  Jun 7, 2017
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#1
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Let Joe's CDs =J
Let Peggy's CDs=P
J/P =5/3
5P+.5J=.5J + 18, solve for J, P
P = 18 CDs that Peggy started with
J = 30 CDs that Joe started with. So Joe gave Peggy:
30/2 = 15 CDs.

Guest Jun 7, 2017
#2
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I think there is some info missing from your question!.

Guest Jun 7, 2017
#3
+77165
+1

The first guest's answer couldn't possibly be so.....if she increased her collection by 18, she must have gotten 18 from Joe.....

CPhill  Jun 7, 2017

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