Răspunsuri

2014-10-01T21:39:12+03:00
a+b+c=717
b=3a
b=c-17 => c=17+b  => c=17+3b
a+3a+17+3a=717
7a=700 => a=100 ; b=300 ; c= 317


2014-10-01T21:43:30+03:00
A+b+c=717
b=3a
c=3a+17
a+3a+3a+17=717
7a=717-17
7a=700
a=700:7
a=100
b=3*100
b=300
c=3a+17
c=300+17
c=317
100+300+317=717