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2014-09-19T22:26:08+03:00
546+127-32+146-(62:a+12)-55=689  => 787-(62:a+12)=689+55 => 787-(62:a+12)=744  =>62:a+12=787-744 =>62:a+12=43 =>62:a=43-12 =>62:a=31 =>a=62:31 =>a=2
2 3 2