SOLUTION: MARY IS 12 YEARS OLD.. AGNES IS TWICE THE AGE OF MARY 3 YEARS AGO.. HOW OLD IS AGNES?

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Question 695510: MARY IS 12 YEARS OLD.. AGNES IS TWICE THE AGE OF MARY 3 YEARS AGO.. HOW OLD IS AGNES?
Found 2 solutions by zoomkaboom4, MathTherapy:
Answer by zoomkaboom4(62) About Me  (Show Source):
You can put this solution on YOUR website!
3 years ago, Mary was 9 years old.
9*2 = 18.
18+3= 21 years old.
Agnes is 21 years old.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

MARY IS 12 YEARS OLD.. AGNES IS TWICE THE AGE OF MARY 3 YEARS AGO.. HOW OLD IS AGNES?

Agnes is highlight_green%2818%29 years-old