Question

Anna is now 3 years younger than her sister, Elsa. Four years ago, Anna’s age was one-half Elsa’s age. How old is each girl now?

Answer 1

refer to above attachment

Answer 2

Answer:

Anna is 7, Elsa is 10

Explanation :

take Anna's age as x

take Elsa's age as y;

therefore y= X+3.

4yrs ago

Elsa's age = y-4

Anna's age=x-4

as per the equation,

(y-4)/(x-4)= 2

X+3-4/(x-4)=2

x-1/x-4=2

by transposition, 2x-8=x-1

so X=7, therefore making y as X+3= 10