Question

7 hence a girl was 5 times as old as she was 9 years ago . what is present age

Answer 1

Let the present age of the girl be x yrs. 9yrs ago, her age= (x-9)yrs

and 7 yrs hence, her age=(x+7)yrs

ATQ,

5(x-9) = (x+7)

implies 5x - 45 = x+7

implies 5x-x=7+45

implies 4x=52

implies x= 52/4 = 13

Hence, the present age of the girl is 13yrs.