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2014-11-12T19:19:22+02:00
A+b+c=450
a+b   =340
   b+c=210

c=450-340             
c=110         
 
 b=210-110
b= 100
2 5 2
2014-11-12T19:26:13+02:00
A+b+c=450
a+b=340
b+c=210
c=450-340
c=110
b=210-110
b=100