\( x = 17-17 \)
\( x = 0 \)
\( y = \frac{3}{26} + \frac{19}{26} \)
\( y = \frac{3+19}{26} \)
\( y = \frac{22}{26} \)
\( y = \frac{11}{13} \)
\( a = \frac{11}{13} - \frac{6}{13} \)
\( a = \frac{11-6}{13} \)
\( a = \frac{5}{13} \)
Ответ: а) \( x=0 \); б) \( y=\frac{11}{13} \); в) \( a=\frac{5}{13} \)