SOLUTION: Ann is 6 years older than Mary. She is also twice as old as Mary was when Ann was as old as Mary is now. How old is each now?

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If =>
And
Then:
...because Ann is years older than Mary.
and
....She is also as old as Mary was when

use these two equations above to solve the problem:

since the left sides of the equations above are equal, and then right sides must be equal too:

….move

……….. Mary is
Then ………………......Ann is

check:
Ann is , Mary is => Ann is years older then Mary or
When was as old as is now, means it was before
years
and before years Ann was and Mary was
When Ann was , she was twice as old as Mary ().