zad 1 {5x-y=21 {y-2x=-3 zad2 {3x+y=10 {2x-y=20 zad3 {2xy=10 {x+2y=20 zad4 {x+4y=-32 {2x+3y=33
zad 1
{5x-y=21
{y-2x=-3
zad2 {3x+y=10
{2x-y=20
zad3
{2xy=10
{x+2y=20
zad4
{x+4y=-32
{2x+3y=33
zad 1. {5x-y=21 {y-2x=-3 {5x-y=21 {-2x+y=-3 +_________ 3x=18 x=6 y=21-5x y=21-30 y=-9 x=6