Răspuns: [tex]\frac{85}{42}[/tex]
[tex]\frac{7}{5}: \frac{14}{15}+ \frac{3}{2}: \frac{9}{4}- \frac{1*1}{2} *\frac{2}{7}[/tex]
= [tex]\frac{7}{5} * \frac{15}{14}+ \frac{3}{2}* \frac{4}{9}- \frac{1}{2}* \frac{2}{7}[/tex]
= [tex]\frac{1}{1} * \frac{3}{2}+ \frac{1}{1}* \frac{2}{3}- \frac{1}{1} * \frac{1}{7}[/tex]
= [tex]\frac{3}{2} + \frac{2}{3}- \frac{1}{7}[/tex]
= [tex]\frac{63}{42} + \frac{28}{42} - \frac{6}{42}[/tex]
= [tex]\frac{85}{42}[/tex]
