Honza

Honza is 13 years old, and Peter is 21 years old. After how many years are their ages, will they be at a ratio of 7:9?

Correct answer:

x =  15

Step-by-step explanation:


9·(13+x) = 7·(21+x)

2x = 30


x = 30/2 = 15

x = 15

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