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Mathematics, 03.02.2021 01:00 fatback7063

There were ships with 3 masts and ships with 4 masts at the Tall ship exhibition. Mollie counted a total of 30 masts on 9 ships she saw. How many of these ships had 4 masts?

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There were ships with 3 masts and ships with 4 masts at the Tall ship exhibition. Mollie counted a t...
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