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dasa as mai avea 5 lei as avea cu 10% mai multi bani decat am, ce suma de bani am?

Răspuns :

Răspuns:

[tex]a + 5 = 10\% \times a + a \\ a + 5 = \frac{10}{100} \times a + a \\ a + 5 = \frac{1}{10} \times a + a \\ a + 5 = \frac{a}{10} + a \\ a + 5 = \frac{11a}{10} \\ 10(a + 5) = 11a \\ 10a + 50 = 11a \\ - a = - 50 \\ a = 50lei[/tex]