Odpowiedź:
Metoda podstawiania:
{x + 2y = 8
{2x - y = 1
---
{x = 8 - 2y
{2*(8-2y) - y = 1
---
{x = 8 - 2y
{16 - 4y - y = 1
---
{x = 8 - 2y
{-5y = -15 |:(-5)
---
{x = 8 - 2y
{y = 3
---
{x = 8 - 2*3
{y = 3
---
{x = 2
{y = 3
Szczegółowe wyjaśnienie:
Odpowiedź:
[tex]\underline \left\{ \begin{array}{lll} x + 2y = 8\\ 2x - y = 1\end{array}[/tex]
3x + y = 9
y = 9 - 3x
2x - y = 1
2x - 9 + 3x = 1
5x = 10
x = 2
2 * 2 - y = 1
4 - y = 1
-y = -3
y = 3
