notam cu a,b,c,r elementele:
a=b*c+r, r<b
6+r=b*c+r
6=b*c.
avem solutiile(in ordine a,b,c,r):6,1,6,o; 6,2,3,0; 7,2,3,1; 7,3,2,1; 6,3,2,0; 8,3,2,2; 6,6,1,0 7,6,1,1; 8,6,1,2; 9,6,1,3; 10,6,1,4; 11,6,1,5.
daca enuntul mai spune ceva, vor fi mai putine solutii.
