Question 825910
Let
x - be Maricel's age in the present
2x - be Maridol's age in present

x-3 - Maricel's age 3 years ago
2x+6 - Maridol's age in 6 years

2x+6 = 4(x-3)
2x+6 = 4x-12
18 = 2x
9 = x

Therefore,
Maricel is 9 years old and Maridol is 18


hope that helps, :)