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2014-09-16T09:58:51+03:00
Ma = a+b+c+d+e/5=3.4
a+b+c+d+e = 3.4*4
a+b+c+d+e=17

a+b+c/3 = 2.8
a+b+c = 2.8*3
a+b+c = 8.4

si inlocium sus:

a+b+c+d+e = 17
a+b+c = 8.4
8.4+d+e = 17
d+e = 8.6

ma = d+e/2
ma=8.6/2
ma=4.3

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