Выполните действие:
\(\frac{a}{x-y} - \frac{b}{y-x}+\frac{c}{x-y}\) .
\(\frac{a+b+c}{x-y}\)
\(\frac{a+b-c}{x-y}\)
\(\frac{a+b+c}{y-x}\)
\(\frac{a-b-c}{x-y}\)