elaine has 88 coins in a jar. they are all 5 cent and 10 cent coins. the total value of the coins is $7. how many of each type of coin does elaine have?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

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