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2x-y=3,x+2y=4 metoda reducerii

Răspuns :

2x-y=3
x+2y=4 
=
amplificam prima ecuatie cu 2 :
4x-2y=6
x+2y=4
adunam ecuatiile :
5x=10
x+2y=4
=
x=2
2+2y=4
=
x=2
2y=4-2
=
x=2
y=1