Stelsels met breuken

Substitutie of combinatie

\(\left\{\begin{matrix}-4x+5y=\frac{17}{40}\\x=y+\frac{-13}{40}\end{matrix}\right.\)

\(\left\{\begin{matrix}-4x+5y=\frac{17}{40}\\x=y+\frac{-13}{40}\end{matrix}\right.\qquad V=\{(\frac{-6}{5},\frac{-7}{8})\}\)