Responder:
# x = -1 # y # y = 0 #
Explicación:
#color (blanco) (xx) x = y-1 #, # 2x + y = -2 #
#color (blanco) xx2x + y = -2 <=> x = (- y-2) / 2 #
# => y-1 = (- y-2) / 2 #
# => color (rojo) (2xx) (y-1) = color (rojo) (2xx) (- y-2) / 2 #
# => 2y-2color (rojo) (+ 2) = - y-2color (rojo) (+ 2) #
# => y = 0 #
#color (blanco) (xx) x = y-1 #
#color (blanco) (xxx) = color (azul) 0-1 #
#color (blanco) (xxx) = - 1 #