Odpowiedź w załączniku.
a) [latex]egin{cases}3x+y=5\ 2x-y=0end{cases}[/latex] +___________ [latex]5x=5 /:5[/latex] [latex]x=1[/latex] [latex]egin{cases}x=1\ 2x-y=0end{cases}[/latex] [latex]egin{cases}x=1\ 2 cdot 1-y=0end{cases}[/latex] [latex]egin{cases}x=1\ 2-y=0end{cases}[/latex] [latex]egin{cases}x=1\y=2end{cases}[/latex] ======================= f) [latex]egin{cases}3x-2y=-12 / cdot (-2)\2x-5y=-19 / cdot 3end{cases}[/latex] [latex]egin{cases}-6x+4y=24\6x-15y=-57end{cases}[/latex] +_________ [latex]-11y=-33 /:(-11)[/latex] [latex]y=3[/latex] [latex]egin{cases}3x-2y=-12\y=3end{cases}[/latex] [latex]egin{cases}3x-2 cdot 3=-12\y=3end{cases}[/latex] [latex]egin{cases}3x-6=-12\y=3end{cases}[/latex] [latex]egin{cases}3x=-12+6\y=3end{cases}[/latex] [latex]egin{cases}3x=-6 /:3\y=3end{cases}[/latex] [latex]egin{cases}x=-2\y=3end{cases}[/latex]