7 11/15 - (х-3 4/15)=2 8/9 х-3 4/15= 7 11/15-2 8/9 116/15-26/9=(348-130)/45=218/45 х-3 4/15=218/45 х=218/45+3 4/15 218/45+3 4/15=218/45+49/15=(218+147)/45=365/45= х=8 1/9 8 5/45=8 1/9