rozwiaż uklad rownan \left \{ {{-3x+4y=7} \atop {2x-3y=-6}} \right metoda przeciwnych wspolczynnikow.
-3x+4y=7|*2
2x-3y=-6|*3
-6x+8y=14
6x-9y=-18
------------- +
-y=-4 => y=4
2x-3*4=-6
2x-12=-6
2x=6
x=3
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-3x+4y=7|*2
2x-3y=-6|*3
-6x+8y=14
6x-9y=-18
------------- +
-y=-4 => y=4
2x-3*4=-6
2x-12=-6
2x=6
x=3