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2014-09-28T15:15:56+03:00
A=60
b=50
c=40
a-b=10=>a=b+10
b-c=10=>b=c+10
a+b+c=150=>b+10+c+10+c=150
c+10+10+c+10+c=150
3c=120
c=40
2 5 2