Răspuns:
[tex]\frac{2}{7} -(1-\frac{5}{7} )*(\frac{13}{2} -\frac{3}{4} )=\frac{2}{7}-\frac{7-5}{7} *\frac{26-3}{4} =\frac{2}{7}-\frac{2}{7} *\frac{23}{4} =\frac{2}{7}-\frac{2*23}{7*4} =\frac{8}{28} -\frac{46}{28} =-\frac{38}{48} =-\frac{19}{24}[/tex]
Explicație pas cu pas:
