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2014-11-13T17:23:04+02:00
A+b=21
b+c=5
a+c=22
2a+2b+2c=48
a+b+c=48:2
a+b+c=24
a+b=21
c=24-21
c=3
a+c=22
a+3=22
a=22-3
a=19
b+c=5
b+3=5
b=5-3
b=2
19*2*3=114
6 4 6