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The denominator of a certain fraction is three more than twice the numerator

The denominator of a certain fraction is three more than twice the numerator. If 7 is added to both terms of the fraction, the resulting fraction is 3/5.

Find the original fraction.

A bill for USD123 was paid with USD5 and USD1 notes.

A bill for $123 was paid with USD5 and USD1 notes. A total of 59 notes was used to pay the bill.

Find how many $5 notes were used.

Duration: 
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The sum of Jack's age and Jill's ages is 18.

The sum of Jack's age and Jill's ages is 18. In 3 years, Jack will be twice as old as Jill.

What are their ages now?

Duration: 
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In company X, about 3 times as many computers are manufactured per day

In company X, about 3 times as many computers are manufactured per day than in company Y.

If the total number of these computers manufactured per day is 26420, find the number manufactured in company Y and the number manufactured in company X.

Duration: 
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Mrs. Smith's Biology class has a total of 27 students

Mrs. Smith's Biology class has a total of 27 students. The number of males is 5 more than the number of females.

How many males and how many females are in the Biology class of Mrs. Smith?

Duration: 
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