Question 552094
The age of the father will be five times the age of his son in five years time. If the sum of their ages now is 80 years. Calculate the present age of the father.
=============================
Let f = the father's present age
Let s = the son's present age
Given: in 5 years the father will be 5 times as old as the son; sum of their ages is 80
Put this information in equation form:
f + 5 = 5(s + 5)
f + s = 80 -> s = 80 - f
f + 5 = 5((80 - f) + 5)
Solve for f:
f + 5 = 425 - 5f
6f = 420
f = 70
So the father is 70 years old