Question

Calculati un numar, stiind ca inmultindu-l cu 1,3 obtinem acelasi rezultat ca atunci cand il adunam cu 3,72. Dau coroana ajutatima

Answer 1

$a*1,3= a+3,72 \\\\ a* \frac{13}{10}=a+3,72 \\\\ \frac{13a}{10}^{(10}=a^{(100}+\frac{372}{100} \\\\ 130a=100a+372 \\\\ 130a-100a=372 \\\\ 30a=372 \ \ |:6 \\\\ 5a=62 \\\\ \boxed{a=\frac{62}{5} \to 12,4}$

Answer 2

12,4 sper ca team ajutat cavaler