Explicație pas cu pas:
[tex]( \frac{1}{x} + \frac{2}{3x} - \frac{4}{x} ) \div ( \frac{2}{x} - \frac{1}{4x} + \frac{2}{x} ) = - \frac{7}{3x} \div ( \frac{4}{x} - \frac{1}{4x} ) = - \frac{7}{3x} \div \frac{15}{4x} = - \frac{7}{3x} \times \frac{4x}{15} = - \frac{7}{3} \times \frac{4}{15} = - \frac{28}{45} ≈ - 0,62[/tex]
