[tex]z\ kazdego\ rownania\ nalezy\ wyznaczyc\ zmienna\ :\ y\\\\1)\\\\\begin{cases}y=-x+5\\3x-2y=-15 \end{cases}\\\\\begin{cases}y=-x+5\\ -2y=-3x-15\ \ |:(-2) \end{cases}\\\\\begin{cases}y=-x+5\\ y= \frac{3}{2}x+\frac{15}{2} \end{cases}[/tex]
[tex]2)\\\\\begin{cases}8x-2y=4 \\3y-12x=-6 \end{cases}\\\\\begin{cases} -2y=-8x+4\ \ |:(-2) \\3y =12x-6\ \ |:3 \end{cases}\\\\\begin{cases} y=4x-2 \\ y =4x-2\end{cases}[/tex]
[tex]3)\\\\\begin{cases}0,6x-y=4\\3x-5y=10 \end{cases}\\\\\begin{cases} -y=-0,6x+4\ \ |*(-1)\\ -5y=-3x-10\ \ |:(-5) \end{cases} \\\\\begin{cases} y=0,6x-4 \\ y= \frac{3}{5}x +2 \end{cases}[/tex]
