ex 4 dau coroana +5 stele punctul h
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Răspuns:
7x-6y=19
x-2y=5 |*(-3)
7x-6y=19
-3x+6y=-15
(folosim metoda reducerii)
4x=4|:4
x=1
1-2y=5
-2y=4
y=-2