At present the sum of ages of father and daughter is 65 years.what will the sum of their ages after years?
Answers
Given : At present the sum of ages of father and daughter is 65 years.
https://brainly.in/question/47735880
To Find: sum of their ages after 7 years
Solution :
Assume current age of Daughter = D years
and current age of Father = F years
sum of ages of father and daughter is 65 years.
=> D + F = 65
After 7 year age of Daughter = D + 7 years
After 7 year age of Father = F + 7 years
sum of their ages after 7 years = D + 7 + F + 7
= D + F + 14
Substitute D + F = 65
= 65 + 14
= 79
sum of their ages after 7 years is 79
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Step-by-step explanation:
Now it is also given that after 5 years the age of the father will be twice the age of his son.
So, after 5 years the age of the father = (x + 5) years.
And the age of his son after five years = (y + 5) years.
Now again construct the linear equation according to above information we have,
Age of the father after 5 years = 2(age of his son after 5 years).
Therefore, x + 5 = 2(y + 5)