Răspuns :
c+s+m=3350
c+s=1510=>m=3350-1510=1840
s+m=2190=>c=3350-2190=1160
c+s=1510=>s=1510-1160=350
----------------------------------------------------
q.e.d.
c+s=1510=>m=3350-1510=1840
s+m=2190=>c=3350-2190=1160
c+s=1510=>s=1510-1160=350
----------------------------------------------------
q.e.d.