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2014-11-08T19:05:23+02:00
A = 72/c    b= 108/c    5·72/c + 3·108/c = 36      360 + 324 =37c ⇒ c= 684/37 
a = 72·37/684 = 74/19    b= 108·37/684 = 111/19
5·74/19 + 3·111/19 =370/19 + 333/19 = 703/19 = 37
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