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My grandmother married at the age of 21 and her grandfather was 25 at the time. Today, the old father is three times older than at the wedding. How old are they today?

Correct answer:

d =  75
b =  71

Step-by-step explanation:

D=25 d=3 D=3 25=75
b=21+(dD)=21+(7525)=71



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