Question

Jane is 3 years younger than her brother. The sum of their ages is half that of Mdm. Punitha's. 15 years from now, the sum of their ages will equal Mdm. Punitha's. How old is Jane?​

Answer 1

Variables:

Jane = x

Her Brother = y.

Mdm. Punitha's = z.

x = y - 3

x + y = z

If z = 15 Now.

x - y = -3

x + y = 15

--------------- -

-2y = -18

y = -18 / -2

y = 9 years old.

x = y - 3

x = 9 - 3

x = 6 years old.

Jane is 6 years old.