Question

The sum of mother's age and thrice the age of his son is 80.If we double the age of the mother and add it to the age of his son the sum is 90.find their present ages.
(Ans-son's age=14yrs , Mother's age=38yrs).​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Son's age = 14

Mother's age = 38

Step-by-step explanation:

Let the Son's age be x

Let the Mother's age be y

case 1

Son's age = 3x

Mother's age = y

3x + y = 80 -------------1

case 2

Son's age =  x

Mother's age =2y

x + 2y = 90 -------------2

Taking 1 and 2-

3x +y = 80

x + 2y =90

using elimination method-

(3x + y = 80)-2

x + 2y = 90

Therefore x = 14

                 y =38