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2014-03-31T20:19:32+03:00
A-b=b/2⇒a=3b/2
a+b=1600(a-b)⇒a+b=1600+b/2⇒3b/2+b=1600+b/2⇒5b/2=1600+b/2⇒4b/2=1600⇒2b=1600⇒b=800
a=3·800/2⇒a=3·400⇒a=1200
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