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2014-11-01T12:21:20+02:00
A=b+18
(a+b)/(a-b)=5 rest 14
(b+18+b)/(b+18-b)=5 rest 14
(2b+18)/18=5 rest 14
2b+18=5•18+14
2b+18=104
2b=86
b=43
a=43+18=61