Respuesta:
5x-y = 9 5x - 9 = y
2x+y = 12 y = 12 - 2x
5x - 9 = 12 - 2x
7x = 21
x= 3
y = 12 -2(3) = 6
y = 6
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Respuesta:
5x-y = 9 5x - 9 = y
2x+y = 12 y = 12 - 2x
5x - 9 = 12 - 2x
7x = 21
x= 3
y = 12 -2(3) = 6
y = 6