[tex] \frac{30}{100} \times x = 15 \\ \frac{3}{10} \times x = 15 \: - am \: simplificat \: fractia \: cu \: 10 \\ x = \frac{15}{ \frac{3}{10} } \\ x = \frac{15}{1} \div \frac{3}{10} \\ x = \frac{15}{1} \times \frac{10}{3} \\ x = \frac{150}{3} \\ x = 50[/tex]
Răspuns: C.50
