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2014-03-24T19:59:21+02:00
c=8,3-2,7=5.6
b=8,3-5,6=2,7
a=2,7-b=0.
R: a=0 ; b= 2,7 ; c=5,6.
3a+5b+2c=0+5·2,7+2·5.6=13.5+11.2=24.7
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