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2009-12-09T19:20:57+01:00
6x-3y=9
x+5y=-9,5 /*(-6)

6x-3y=9
-6x-30y=57
-------------------dodajemy
-33y=66
y=-2

x+5y=-9,5
x=-9,5-5y
x=-9,5-5*(-2)
x=-9,5+10
x=½
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2009-12-09T19:36:08+01:00
6x-3y=9/:3
x+5y=-9,5

2x-y=3
x+5y=-9,5/×(-2)

2x-y=3
-2x-10y=19

2x-y-2x-10y=3+19
-11y=22/:(-11)
y=-2

2x-(-2)=3
2x+2=3
2x=1/:2
x=½








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