Odgovor:
# (x, y) = (3,5) #
Pojasnilo:
Če #barva (bela) ("XXX") y = 1 / 3x + 4 #
in #barva (bela) ("XX") y = 2x-1 #
potem
#barva (bela) ("XXX") 2x-1 = 1 / 3x + 4 #
#barva (bela) ("XXX") 5 / 3x = 5 #
#barva (bela) ("XXX") x = 1 #
#barva (bela) ("XXXXXXX") #in to nadomestiti #rarr y = 1 / 3x + 4 #
#barva (bela) ("XXXXXXXXXXXXXXXXXXXX") # daje # y = 5 #