Răspunsuri

2014-05-01T13:38:36+03:00
A+b+c=2013
b=(a+c):2
a-c=142
a+c=2b
inlocuim in prima relatie
2b+b=2013
3b=2013
b=671
a+c=2*671
a+c=1342
a-c=142=>a=142+c
142+c+c=1342
2c=1342-142
2c=1200
c=600
a+600=1342
a=1342-600
a=742
V: 742+600+671=2013