In 2 years a boy will be 3/4 as old as his sister. 2 years ago he was 2/3 as old as she. How old are they?
1 Answer
Sep 10, 2015
The boy is
and his sister is
Explanation:
Define
We are told
[1]
and
[2]
[1] can be simplified into standard form as
[3]
[2] can be simplified into standard form as
[4]
Multiply [3] by 2 and [4] by 3
[5]
[6]
Subtract [5] from [6]
[7]
Substitute
[8]
[9]
[10]