Sagot :
[tex]A = \frac{2}{3} + \frac{5}{3} * \frac{1}{-2} [/tex]
[tex]= \frac{2}{3} - \frac{5}{6} [/tex]
[tex]= \frac{4}{6} - \frac{5}{6} [/tex]
[tex]= - \frac{1}{6} [/tex]
[tex]= \frac{2}{3} - \frac{5}{6} [/tex]
[tex]= \frac{4}{6} - \frac{5}{6} [/tex]
[tex]= - \frac{1}{6} [/tex]