Odpowiedź:
[tex]\left\{ \begin{array}{l} -3x + 2b = 0 \\ \frac{1}{2}x + 2 = 0 \end{array}[/tex]
[tex]\frac{1}{2}x + 2 = 0[/tex] | * 2
x + 4 = 0
x = - 4
[tex]- 3x + 2b = \frac{1}{2}x + 2[/tex] |* 2
-6x + 4b = x + 4
-7x + 4b = 4
-7 * (-4) + 4b = 4
28 + 4b = 4
4b = - 24
b = - 6
Odp. D. b = - 6
