Antwoord:
# X = -1 # en # Y = 0 #
Uitleg:
#color (wit) (xx) x = y-1 #, # 2x + y = -2 #
#color (wit) xx2x + y = -2 <=> x = (- y2) / 2 #
# => Y-1 = (- y2) / 2 #
# => Kleur (rood) (2xx) (y-1) = kleur (rood) (2xx) (- y-2) / 2 #
# => 2y-2color (rood) (+ 2) = - y-2color (rood) (+ 2) #
# => Y = 0 #
#color (wit) (xx) x = y-1 #
#color (wit) (xxx) = kleur (blauw) 0-1 #
#color (wit) (xxx) = - 1 #