Răspuns :
a+b+c=113
a+b=56
b=c:3
56+c=114
c=113-56
c=57
b=57:3
b=19
a+19=56
a=56-19
a=37
(verificare) 37+19+57=113
a+b=56
b=c:3
56+c=114
c=113-56
c=57
b=57:3
b=19
a+19=56
a=56-19
a=37
(verificare) 37+19+57=113