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Question: A father's age is thirteen times that of his son. In 10 years, the son's age will be one-third of his father's. How old are the father and son?
Answers:

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It is easy, just write the problem in slightly more mathematical manner:
father's age = 13 * son's age
son's age + 10 = (father's age + 10 )/3
Because we know that father's age is 13* son's age, we have
son's age + 10 = (13*son's age + 10)/3
or
3*(son's age + 10) = (13*son's age + 10)
or
3*son's age + 30 = 13*son's age + 10
20 = 10 * son's age
ANSWER:
son's age = 2
father's age = 13*2 = 26.

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that is completely right......the son is 2 years old.......the father is 26 years old

You can put this solution on YOUR website!
father's age = 13 * son's age
son's age + 10 = (father's age + 10 )/3
Because we know that father's age is 13* son's age, we have
son's age + 10 = (13*son's age + 10)/3
or
3*(son's age + 10) = (13*son's age + 10)
or
3*son's age + 30 = 13*son's age + 10
20 = 10 * son's age
ANSWER:
son's age = 2
father's age = 13*2 = 26.

You can put this solution on YOUR website!
13*2 = 26

You can put this solution on YOUR website!
father's age= 36
Son's Age = 12

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A father's age is thirteen times that of his son. In 10 years, the son's age will be one-third of his father's. How old are the father and son?



Father's current age: 

Son's current age:      

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 Father is 26 and son is 2 years old. 

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 assuming son's age to be x years 

father's age becomes 13x

acc to question 

13x +10 = 3(x +10)

solving this we get x = 2 

son's age 2yr

father's age 26yr 


Question:  2A/3=8+4A  What is A? 

Answers:

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     What is A?

The common denominator is 3, so we multiply every term through by 3:



Now the 3's cancel on the left and we have

      

Now we subtract 12A from both sides

  

combine the 2A and the -12A on the left, getting -10A

   

Now we divide both sides by -10 to get A:

   

Reduce the fraction:

    or if you prefer 

Edwin J

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Quiz Quiz for 4 yr-olds

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