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My VK channel — https://vk.com/yellow.school Mom lent her daughter 25 rubles. And dad lent her 25 rubles. The girl went to the store and bought something there for 45 rubles. On the way home, she lent her friend 3 rubles. She had 2 rubles left and she returned 1 ruble to her mom, and 1 ruble to her dad. In total, she owes her parents 48 rubles. But when her friend returns 3 rubles, it will be 51 rubles. Question: where did the extra ruble come from?