SOLUTION: alan has 8 more marbles than jon does.if alan has 21 marbles,how many does jon have?

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Question 782821: alan has 8 more marbles than jon does.if alan has 21 marbles,how many does jon have?
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
21-8 = 13
Answer: 13
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