Odpowiedź :
[tex] - 5x - 2y + ( - x) + 6y = - 5x - x - 2y + 6y = - 6x + 4y[/tex]
[tex] - 6x + 4y = - 6 \times ( - 23) + 4 \times 0.5 = 138 + 2 = 140[/tex]
[tex] - 5x - 2y + ( - x) + 6y = - 5x - x - 2y + 6y = - 6x + 4y[/tex]
[tex] - 6x + 4y = - 6 \times ( - 23) + 4 \times 0.5 = 138 + 2 = 140[/tex]