This year, the combined age of the two sisters is 55 years old. Once upon a time, the elder sister's age was that of the younger sister this year. At that time, the elder sister's age was just twice that of the younger sister. How old are the two sisters this year?

Suppose the age of my sister was x years ago, then my sister was 2x years ago. My sister is 2x years old this year, and my sister is 3x years old this year, 2x + 3x = 55, & nbsp; & nbsp; 5x = 55, & nbsp; & nbsp; X = 11. My sister is 3x = 3 × 11 = 33. My sister is 2x = 2 × 11 = 22. A: my sister is 33. My sister is 22

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