Counsuela is three times as old as mary. in 10 years she will be only twice mary's age. how old was councuela 4 years ago?

Mary is x years old.
Consuela is three times as old as Mary, so she's 3x years old.
In 10 years Mary will be x+10 years old, and Consuela will be 3x+10 years old.
In 10 years Consuela will be twice Mary's age, so she'll be 2(x+10) years old.



Now Consuela is 30 years old.



4 years ago Consuela was 26 years old.