Posted by **HELP!!!** on Saturday, April 30, 2011 at 2:43am.

Dominic was 8 years old when his sister was born. Now the sum of their ages i 56. How old is Dominic now?

- Math -
**Jai**, Saturday, April 30, 2011 at 3:51am
from the first statement, it implies that Dominic is 8 years older than his sister.

first we represent unknowns using variables:

let x = sister's age

let x+8 = Dominic's age

since the sum of their ages is 56,

x + (x + 8) = 56

then we solve for x:

2x + 8 = 56

2x = 48

x = 24 (sister's age)

x+8 = 32 (Dominic's age)

hope this helps~ :)

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