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2014-05-08T20:54:33+03:00
A+b/2=2.8
a+b=5.6=>b=5.6-a

a+c/2=3.5
a+c=7 =>c=7-a

b+c/2=3.9
b+c=7.8
5.6-a+7-a=7.8
5.6+7-7.8=a+a
4.8=2a
a=4.8:2
a=2.4

b=5.6-2.4
b=3.2

c=7-2.4
c=4.6
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