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2014-09-17T18:13:59+03:00
(a+b)/2=6,06 => a+b = 6,-6*2=12,12
a/b=4,15 => a=4,15b
4,15b+b=12,12 
5,15b=12,12
b=12,12/5,15=1212/100 *100/515 = 1212/515=2,35
a=4,15*2,35=9,76
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