7x – 3y =
15 / ·2
5x + 6y
= 27
14x – 6y
= 30
5x + 6y =
27
19x = 57 / :19
x = 3
dosadím do druhé rovnice:
5
· 3 + 6y = 27
15 + 6y = 27 / -15
6y = 12 / :6
y
= 2
ZK: L1:
7 · 3 – 3 ·
2 = 21 – 6 = 15 P1:
15 L1
= P1 L2:
5 · 3 + 6 ·
2 = 15 + 12 = 27 P2:
27 L2
= P2 |