Question

Five years ago, the father's age was 3 times more than 7 times the son's age at that time. If after five years the age of the father is three times more than three times the son's age. Find the age of the father.​

Answer 1

let son's age be x and father's be y

now, 5years ago son's age=x-5 and father's age=y-5 according to given condition y-5+3=7(x-5). y-2=7x-35. y-7x=-33 eq1 after 5 years son's age x+5 and father's age y+5 according to given condition y+5+3=3(x+5). y+8=3x+15. y-3x=7 eq2. now by solving eq1and2 find x and y then x will be the age of son and y will be age of father.