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2014-10-30T10:39:36+02:00
A=b+72
(a+b):(a-b)=5 rest 4
a-b=b+72-b=72
2b+72 : 72= 5 r 4⇒2b+72=72×5+4=364⇒2b=292⇒b=146⇒a=218
1 5 1