Răspuns :
[tex]x \times \frac{5}{7} = 35[/tex]
[tex]x = 35 \div \frac{5}{7} = \frac{35}{1} \times \frac{7}{5} = 7 \times 7 = 49[/tex]
[tex]x \times \frac{5}{7} = 35[/tex]
[tex]x = 35 \div \frac{5}{7} = \frac{35}{1} \times \frac{7}{5} = 7 \times 7 = 49[/tex]