x0x+y0x supra 404 O fractie este echiunitara atunci cand are numitorul egal cu numaratorul. x0x+y0x=404 100x+0+x+100y+0+x=404 100(x+y)+2x=404 100x+100y+2x=404 102x+100y=404 102x2+100y=404 204+100y=404 100y=404-204 100y=200 y=200:2 y=2 Deci x=2,iar y=2
