Answer: See explanation
Explanation:
Michael is X years old.
Jenny is twice as old as Michael. Thus means that Jenny = 2 × x = 2x
The sum of their ages is 57.
Therefore, x + 2x = 57
3x = 57
x = 57/3 = 19
Michael is 19 years
Jenny's age = 2x = 2 × 19 = 38 years