Odpowiedź:
Szczegółowe wyjaśnienie:
{2x - y = 3 I - 2x
{x + 3y = 5
{-y = 3 - 2x I * (-1)
{y = -3 + 2x
x + 3 * (-3 + 2x) = 5
x - 9 + 6x = 5
7x - 9 = 5 I + 9
7x = 14 I : 7
x = 2 , y = -3 + 2 * 2 = -3 + 4 = 1
Odp. x = 2 , y = 1
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Odpowiedź:
Szczegółowe wyjaśnienie:
{2x - y = 3 I - 2x
{x + 3y = 5
{-y = 3 - 2x I * (-1)
{x + 3y = 5
{y = -3 + 2x
{x + 3y = 5
x + 3 * (-3 + 2x) = 5
x - 9 + 6x = 5
7x - 9 = 5 I + 9
7x = 14 I : 7
x = 2 , y = -3 + 2 * 2 = -3 + 4 = 1
Odp. x = 2 , y = 1