odpoveď:
# (X, y) = (3,5) #
vysvetlenie:
ak #COLOR (biely) ("XXX"), y = 1 / 3x + 4 #
a #COLOR (biely) ("XX") y = 2x-1 #
potom
#COLOR (biely) ("XXX") 2x-1 = 1 / 3x + 4 #
#COLOR (biely) ("XXX") 5/3 x = 5 #
#COLOR (biely) ("XXX") x = 1 #
#COLOR (biely) ("XXXXXXX") #a nahradenie týmto #rarr y = 1 / 3x + 4 #
#COLOR (biely) ("XXXXXXXXXXXXXXXXXXXX") # poskytuje # y = 5 #