Asked by Sammyjoo

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?

Answers

Answered by Rina
Marissa is 12 which means the younger bro is 9
Answered by Sammyjoo
I know the answer, but is there a special formula to work it out.
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