b)
[tex]( \frac{7}{5} \div \frac{14}{15} + \frac{3}{2} ( \frac{9}{4} - 1 \frac{1}{2} )) \times \frac{2}{7} = \\ ( \frac{3}{2} + \frac{3}{2} \times \frac{3}{4} ) \times \frac{2}{7} = \\ ( \frac{3}{2} + \frac{9}{8} ) \times \frac{2}{7} = \\ \frac{21}{8} \times \frac{2}{7} = \frac{42}{56} = \frac{3}{4}[/tex]
nu am putut pune paranteza dreapta
