Stelsels met breuken

Substitutie of combinatie

\(\left\{\begin{matrix}x+4y=\frac{19}{4}\\-5x+4y=\frac{13}{4}\end{matrix}\right.\)

\(\left\{\begin{matrix}x+4y=\frac{19}{4}\\-5x+4y=\frac{13}{4}\end{matrix}\right.\qquad V=\{(\frac{1}{4},\frac{9}{8})\}\)