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A chemist has one solution that is 20% acid and a second that is 50% acid. How many gallons of each should be mixed together to get 10 gallons of a solution that is 30% acid?
A grocery store is selling hamburger for $1.89 per pound. This is $.28 less than the price at a competitor's store. Find the price at the competitor's store.
Translate the quotient of a number and seven is two into an equation and solve.
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