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2014-05-05T21:10:01+03:00
A+b+c=111
a= b+c supra 2
b+c supra 2 + b+c supra 2 =111
2 x b+c supra 2 = 111
b+c =111: 3 x 2= 37 x 2 -= 74
4 4 4