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