Posted by Sammyjoo on Thursday, June 7, 2012 at 12:07am.
15) Marissa is 3 years older than her younger brother. Her older brother is twice as old as her younger brother. Her older brother is 18. How old are Marissa and her younger brother?

Math  Rina, Thursday, June 7, 2012 at 12:32am
Marissa is 12 which means the younger bro is 9

Math  Sammyjoo, Thursday, June 7, 2012 at 6:54am
I know the answer, but is there a special formula to work it out.
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