За 15 книг і 10 альбомів заплатили 35 гривень. Скільки коштує книга і скільки коштує альбом, якщо альбом рожчий від книги на 1 гривню?
andry92526
1
17.05.2021 15:38
0
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2
х-стоит альбом,х-1-стоит книга
15(х-1)+10х=35
15х-15+10х=35
25х=50
х=2р-стоит альбом
2-1=1р стоит книга