1. Rezovati prin metoda reducerii sistemelor :
a) -x+y=7 ; x+3y=5
b) x+y=4 ; x-y=14
c) 3x+y=13 ; x+y=7
d) 2x-4y=8 ; 0,7x+y=10
e) 3x+2y=5 ; 5x-y=4
f)4x-y=19 ; 3x-3y=12

2. Rezovati prin metoda reducerii sistemelor :
a) 1 supra 4x + 3y= 1 ; -x -2y = -4
b) √3x -√7y= -4 ; 2√3x +3√7y = 27





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2014-04-27T00:43:34+03:00