Rozwiąż układ równań dowolną metodą :
{ 3x - 15 - y = 14x + 28 - 3y
{x²-2x+1 + 2y-6 = 5+x²
{-11x + 2y = 43
{-2x +2y = 10 /*(-1)
{ 2x - 2y = -10
-9x = 33 /:(-9)
x = -33/9
x = -11/3
2*(-11/3) - 2y =-10
-22/3 - 2y = -10
-2y = -10+22/3
-2y = -30/3 + 22/3
-2y = -8/3 /*(-1/2)
y = 4/3
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{ 3x - 15 - y = 14x + 28 - 3y
{x²-2x+1 + 2y-6 = 5+x²
{-11x + 2y = 43
{-2x +2y = 10 /*(-1)
{-11x + 2y = 43
{ 2x - 2y = -10
-9x = 33 /:(-9)
x = -33/9
x = -11/3
2*(-11/3) - 2y =-10
-22/3 - 2y = -10
-2y = -10+22/3
-2y = -30/3 + 22/3
-2y = -8/3 /*(-1/2)
y = 4/3
x = -11/3
y = 4/3