{3x=2y=1 3y-x=7 tamto powyżej to jeden przykład prosze obilcz

[latex]egin{cases}3x-2y=1\ -x+3y=7end{cases}[/latex] [latex]egin{cases}3x-2y=1\ x=3y-7end{cases}[/latex] [latex]3(3y-7)-2y=1[/latex] [latex]9y-21-2y=1[/latex] [latex]7y=22[/latex] [latex]y=frac{22}{7}[/latex] [latex]x=3y-7[/latex] [latex]x=3 cdot frac{22}{7}-7[/latex] [latex]x=frac{66}{7}-frac{49}{7}=frac{17}{7}[/latex] Odp. [latex]egin{cases}x=frac{17}{7}\ y=frac{22}{7}end{cases}[/latex]