Răspuns :
[tex]x \times \frac{56}{90} = \frac{35}{54} [/tex]
[tex]x = \frac{35}{54} \div \frac{56}{90} [/tex]
[tex]x = \frac{35}{54} \times \frac{90}{56} = \frac{35 \times 90}{54 \times 56} = \frac{5 \times 90}{54 \times 8} = \frac{5 \times 10}{6 \times 8} = \frac{5 \times 5}{3 \times 8} = \frac{25}{24} [/tex]