Răspunsuri

2014-03-10T15:27:35+02:00
Drum |+++++++||__2__|____||________|

++++inseamna o treime

deci
d/3+2=d/2            - adica o treime+2=jumatea drumului
2d+12=3d
12=3d-2d
12=d

drumul are 12 kilometri



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