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Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 65% hydrochloric acid solution. How many liters of each should she mix to get 492.188 liters of a hydrochloric acid solution with...

Luke is selling tickets to a school play. each adult ticket cost $10 each and child's ticket cost four dollars. Luke sold 87 for the total of 678 how many tickets of each type did Luke sell?

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