-10x – 4y
= 3
4x + 2y
= -4 / ·2
-10x – 4y
= 3
8x + 4y = -8
-2x = -5 / : (-2)
x =
dosadíme do první rovnice:
-10 · –
4y = 3
-25 – 4y = 3 / + 25
-4y = 28 /: (-4)
y
= -7
ZK: L1:
-10 · – 4 · (-7) = -25 + 28 = 3 P1:
3 L1
= P1 L2:
4 · + 2 · (-7) = 10 – 14 = -4 P2:
-4 L2
= P2 |