Răspuns:
[tex] \frac{7 - 5}{23} + \frac{19 - 7}{46} = \frac{2}{23} + \frac{12}{46} = \frac{2 + 6}{23} = \frac{8}{23} [/tex]
[tex] \frac{1 + 7}{2} + \frac{ - 5 - 9}{11} = \frac{8}{2} + \frac{ - 14}{11} = 4 + \frac{ - 14}{11} = \frac{44 - 14}{11} = \frac{30}{11} [/tex]
Explicație pas cu pas: