rozwiąz uklad rownan
x-2y=3
-2x + y=0
2:
2x+ y=9
5x-4y=3
x-2y=3 |*2
-2x+y=0
2x-4y=6
+ _________
-3y=6 |:(-3)
y=-2
x=-1
2x+ y=9 |*4
8x+4y=36
13x=39 | :13
x=3
y=3
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x-2y=3 |*2
-2x+y=0
2x-4y=6
-2x+y=0
+ _________
-3y=6 |:(-3)
y=-2
x=-1
2x+ y=9 |*4
5x-4y=3
8x+4y=36
5x-4y=3
+ _________
13x=39 | :13
x=3
y=3