Rozwiąz podane równanie metodą przeciwnych wspólczynników x+2y=-2 2x-y=1
x+2y=-2/*-2
2x-y=1
-2x-4y=4
-5y=5/-5
y=-1
x+2y=-2
x+2*-1=-2
x+(-2)=-2
x=-2+2
x=0
x+2y=-2 /*(-2)
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-5y=5 /:(-5)
x+2*(-1)=-2
x-2=-2
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x+2y=-2/*-2
2x-y=1
-2x-4y=4
2x-y=1
-5y=5/-5
y=-1
x+2y=-2
x+2*-1=-2
x+(-2)=-2
x=-2+2
x=0
x+2y=-2 /*(-2)
2x-y=1
-2x-4y=4
2x-y=1
--------------
-5y=5 /:(-5)
y=-1
x+2*(-1)=-2
x-2=-2
x=-2+2
x=0
_________