a+b+c=1500m
a+b=978 m
a=c+19
c=a-19
978m+c=1500m
c=1500m-978m
c=522m (a treia bucata)
a=522+19
a=541 m (prima bucata )
541m+b+522=1500m
b+1063m=1500m
b=1500m-1063m
b=437 m( a doua bucata)
1) Cati m de stofa raman in a doua bucata dupa ce se vand 28 m?
437m-28m=409 m raman