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One number is 2 times another
One number is 2 times another. If you subtract 10 from each number, the sum is 40. What are the numbers?
A bottle contains 750 milliliters of fruit punch
A bottle contains 750 milliliters of fruit punch with a concentration of 50% pure fruit juice. Jill drinks 100 milliliters of the punch and then refills the bottle with an equal amount of a cheaper brand of punch. If the concentration of juice in the bottle is now...
A health clinic uses a solution
A health clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. The sterilization tank contains 100 gallons of a solution of 2% ordinary household bleach mixed with pure distilled water. New research indicates that the concentration of...
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