Решите уравнение:С:(х+2 целых3\13)-1 целая7/26=4 целых5/39
Х+2 3/13=4 5/39+1 7/26 х+2 3/13=161/39+33/26 х+29/13=322/78+99/78 х+29/13=421/78 х=421/78-29/13 х=421/78-174/78 х=247/78 х=3 13/78 х=3 1/6