Rozwiąż układy równań metodą podstawiania:
{2x+y=3
{x+y=7
Z góry dziękuję za pomoc ;)
{x+y=7 /-x
{y=7-x
{2x+7-x=3/-7
{x=-4
{y=7-(-4)
{y=11
{2x + y=3
{x=7-y
{2*(7-y) + y =3
{14 - 2y + y = 3
{14 - y = 3
{x =7-11
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{2x+y=3
{x+y=7 /-x
{2x+y=3
{y=7-x
{2x+7-x=3/-7
{y=7-x
{x=-4
{y=7-x
{x=-4
{y=7-(-4)
{x=-4
{y=11
{2x + y=3
{x=7-y
{2*(7-y) + y =3
{x=7-y
{14 - 2y + y = 3
{x=7-y
{14 - y = 3
{x=7-y
{y=11
{x =7-11
{y=11
{x=-4