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2014-06-15T12:26:14+03:00
A+b+c= 36
a|-------|
b|-------|--------|
c|-------|--------|--------|   +6
36-6=30
1p+2p+3p =6p
30:6=5
a=5
b=5x2 =10
c=5x3+6=21

2 5 2