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1. Mark and Colleen were both studying in Pavia, Mark is in high school, and his sister Colleen is in preschool. In 3 years, Mark will be 3 times as old as his sister Colleen. A year ago, Mark was 7 times as old as Colleen How old are they now?​

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Answer:

Mark is 15

Colleen is 3

Step-by-step explanation:

I can't explain how i get it kase sa utak ko lang sinolve pero we can cross check it.

15+3 years = 18 ÷ 3times older = 6

3 + 3 years = 6 × 3times older = 18

a year ago

15 - 1 = 14

3 - 1 = 2

14 ÷ 2 = 7 × 2

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