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2014-06-03T17:00:51+03:00
A=a
b=a+1
c=a+2
d=a+3

a+b+c+d=2238
a+a+1+a+2+a+3=2238
4a+6=2238
4a=2238-6
4a=2232
a=2232:4
a=558

b=559
c=560
c=561
2014-06-03T17:04:40+03:00
A=a
b=a+1
c=a+2
d=a+3
a+b+c+d= 2238
a+a+1+a+2+a+3=2238
4a+6=2238
4a=2232
a=2232:4
a=558
b=558+1=559
c=558+2=560
d=558+3=561
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