Question

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

Answer 1

Răspuns:

$a + 5 = 10\% \times a + a \\ a + 5 = \frac{10}{100} \times a + a \\ a + 5 = \frac{1}{10} \times a + a \\ a + 5 = \frac{a}{10} + a \\ a + 5 = \frac{11a}{10} \\ 10(a + 5) = 11a \\ 10a + 50 = 11a \\ - a = - 50 \\ a = 50lei$