Svar:
# x = -1 # og # Y = 0 #
Forklaring:
#COLOR (hvit) (xx) x = y-1 #, # 2x + y = -2 #
#COLOR (hvit) xx2x + y = -2 <=> x = (- y-2) / 2 #
# => Y-1 = (- y-2) / 2 #
# => Farge (rød) (2xx) (y-1) = farge (rød) (2xx) (- y-2) / 2 #
# => 2y-2color (red) (+ 2) = - y-2color (red) (+ 2) #
# => Y = 0 #
#COLOR (hvit) (xx) x = y-1 #
#COLOR (hvit) (xxx) = farge (blå) 0-1 #
#COLOR (hvit) (xxx) = - 1 #