Imi plac nucile, asa ca...:
16) a+b+c=850 (1)
a=b-175 (2)
c=a+b (3)
din cele 3 relatii -> (b-175)+b+(b-175+b)=850->4b=850+175+175->4b=1200/:4 -> b=1200:4=300->(2): a=b-175=300-175=125 si din (3)->c=a+b=300+125=425.
Deci a=125, b=300, c=425.
Proba: a+b+c=125+300+425=850
