Question

Five years ago,the age of a person was half of his present age.how old is he now

Answer 1

five years ago age of person be 'x'

therefore present age be(x+5)

by using given condition,

x=[(x+5)/2]

2x=x+5

2x-x=5

×=5

therefore present age is (x+5)=(5+5)=10