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2x-y=7
5x+3y=  --2 rezolvati sistemul


Răspuns :

2x-y=7/*5
5x+3y=-2/*(-2)

10x-5y=35
-10x+6y=4
/    y=39

10x-5*39=35
10x-195=35/+195
10x=230/:10
X=23