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3x+2y=1
toz
-4x-2y=0
3x+2y=1
dodamy te rownania
-4x-2y+3x+2y=0+1
-x=1
x=-1 podstawlaja w 2x+y=0
mamy 2*(-1)+y=0
-2+y=0
y=2
Odpowiedz x=-1 y=2