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2 y =7-x despejando y entonces y = 7-x/2
2 y = -6 x-8 despejando y entonces y= -6x - 8/2
igualando:
7-x/2 = -6x - 8/2
2(-6x - 8) = 2(7-x)
-12x - 16 = 14 - 2x
-12x + 2x = 14 + 16
-10x = 30
x = 30/-10
x = -3
hallamos "y" remplazando una de las ecuaciones despejadas:
2 y =7-x
2y = 7 - (-3)
2y = 7 + 3
2y = 10
y = 10/2
y = 5
Solución:
x = -3 ; y = 5