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Răspuns :

Coronita?

4x+3(y-2)=-1
7x-5(y+2)=9

4x+3y-6=-1
7x-5y-10=9

4x+3y=5 |*5
7x-5y=19 |*3

20x+15y=25
21x-15y=57

41x=57
x=54/41

x=54/41

4*54/41+3y=5
216/41+123y/41=205/41
216+123y=205
123y=-11
y=-11/123