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2014-05-06T19:17:04+03:00
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   fdgvfgvfgvfdgdfgdfgdfg
2014-05-06T19:48:27+03:00
(40-C:3)*2=68
40-C:3=68:2
40-C:3=34
C:3=40-34
C:3=6
C=6*3
C=18
A*4+124=300
A*4=300-124
A*4=176
A=176:4
A=28
1000-63:B=991
63:B=1000-991 
63:B=9
B=63:9
B=7