Marinada '22

[lang=hr] Prije 3 godine brat je bio 7 puta stariji od sestre, a prije 2 godine 4 puta. Koliko je puta brat bio stariji od sestre prošle godine? [/lang] [lang=en] Three years ago, a boy was 7 times as old as his sister. Two years ago, he was 4 times as old as his sister. Last year, he was x times as old as his sister. What is the value of x? [/lang]