Răspuns :
3553+c=6765 c=6765-3553=3208 b+3208=5533 b=5533-3208=2325 a+2325=3533 a=3533-2325=1208
3553+C=6765-3553=3208 b+3208=5533 b=5533-3208=2325 a+2325=3533-2325=1208