Odpowiedź:
[tex]\left \{ {{x+3y=5} \atop {2x-y=3}} \right. \\\left \{ {{x=5-3y} \atop {2(5-3y)-y=3}} \right. \\\left \{ {{x=5-3y} \atop {10-6y-y=3}} \right. \\\left \{ {{x=5-3y} \atop {10-7y=3}} \right. \\\left \{ {{x=5-3y} \atop {-7y=-7}\ \ /:(-7)} \right. \\\left \{ {{x=5-3y} \atop {y=1}} \right. \\\left \{ {{x=5-3*1} \atop {y=1}} \right. \\\left \{ {{x=5-3} \atop {y=1}} \right. \\\left \{ {{x=2} \atop {y=1}} \right. \\[/tex]
