2x – 10y = 40
x + 5y = 10 /· (-2)
2x – 10y = 40
-2x – 10y = -20
-20y = 20
y= -1
dosadíme do druhé rovnice:
x + 5·(-1) = 10
x – 5 = 10
x = 15
ZK:
L1: 2 ·
15 – 10 · (-1) = 30 + 10 = 40
P1:
40
L1
= P1
L2: 15 + 5 ·
(-1) = 15 – 5 = 10
P2:
10
L2
= P2