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2014-03-24T16:24:48+02:00
A+b+c=336
a-x=11=>a=11+x
b-x=12=>b=12+x
c-x=13=>c=13+x

11+x+12+x+13+x=336
3x+36=336
3x=336-36
3x=300
x=300:3
x=100
=>a=100+11=111
=>b=100+12=112
=>c=100+13=113
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