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2014-11-12T18:48:04+02:00
(a+b)·2=114   
a+b=114:2 
a+b=57
a:b=2 r3
a=2b+3
2b+3+b=57
3b+3=57
b=18

a+18=57
a=57-18
a=39

a·b=39·18=702