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The mass of a stone is 5kg. the stone is twice as heavy as a book. the book is 5 times heavier than a ball. what is the mass of the ball?
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The sum of two numbers is 86, and their difference is 20. find the two numbers
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Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have
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Aline passes through 3,7 and 6,9 what equation represents the line
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