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x+2y = 3 x+2y =3 x + 2y = 3
___________
3x = -3
x = -3/3
x = -1
hallamos y x +2y = 3 = -1+2y =3
2y = 3+1
2y =4
y = 4/2
Y = 2
2x - 3y =-4 por 2 4x - 6y = -8
5x+2y = 1 por 3 15x +6y = 3
___________
19x = -5
x = -5/19
hallando y 5x +2y = 1
5(-5/19 ) +2y = 1
-25/19 +2y =1
2y = 1+25/19
2y = (19+25)/19
2y = 44/19
y = (44/19*2)
y = 22/19