Question

a father is four times as old as his son in 4 years time he will be three times as old as his son what are their present age

Answer 1

father=x

son=y

x=4y

x+4=3(y+4)

x+4=3y+12

x=3y+8

4y=3y+8

y=8

x=4y=4*8=32

Answer 2

Son = a

Father = 4a

After 4years

Son = a + 4

Father = 3(a +4)

4a + 4 = 3a+12

a = 8

Son's present age = 8

Father's present age = 32