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2014-05-13T21:13:02+03:00
X+(x+2)+(x+4)+(x+6)=800
x+x+2+x+4+x+6=800
4x+2+4+6=800
4x=788
x=197

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2014-05-13T21:13:27+03:00
x+x+2+x+4+x+6=800
4x+12=800
4x=788
x=197
x+2=199
x+4=201
x+6=203
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