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The second of two numbers is 4 more than the first. The sum is 56. Find the numbers.
Traceling downstream, a boat covers a distance of 27 kilometers in 3 hrs. Traveling upstream it taks the boat twice at mush time to cover 2/3s of the dist. Find the reat of the boat in still water and the rate of the current.
Sam has pennies, nickels, dimes and quarters in his wallet. The average value is 20 cents. He adds another quarter and now the average value is 21 cents. How many dimes are there?
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