Question

The age of father and son is 75 years. The age of the father is 4 percent of the son's age. Father's age, then.​

Answer 1

Answer:

let the father's age is be F and that of the son's 5 year ago

the sum of the ages was 75 - 10 =65

Step-by-step explanation:

$fs \: = 750$

$f + s = 65$

$f(65 - f) = 750$

$f ^ 2 \: - 65f \: + 750 = 0$

$(f - 50)(f - 15) = 0$

f =50 or 15. ( 15 is impossible and so rejected).

The father is 55 years now and the son is 20 years.