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2014-05-10T16:31:19+03:00
A × 2 < 2525 - 2505
a × 2 < 20
a < 20 : 2
a < 10

(a - 4134) -1000 = 4368
a - 4134 = 4368 + 1000
a - 4134 = 5368
a = 4134 + 5368
a = 9502  
1 4 1