Berdintze metodoa erabiliz ondorengo ariketak egin behar dira:
Liburuko 108. orrialdetik 2. ariketa:
a) $\displaystyle \left\{ \begin{array}{l} x + 5y = 4 \\ x - 3y = -4\end{array} \right. $, b) $\displaystyle \left\{ \begin{array}{l} y =\displaystyle \frac{3x +1}{2} \\ 2 x + y = 4 \end{array} \right. $, c) $\displaystyle \left\{ \begin{array}{l} 5x + y = 3 \\ 2x - y = -3 \end{array} \right. $, d) $\displaystyle \left\{ \begin{array}{l} 4x +3y = 3 \\ 2x+6y=3\end{array} \right. $
