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2014-08-22T14:45:06+03:00
(43+x)+(537-214)=975
(43+x)+323=975
43+x=975-323
43+x=652
x=652-43
x=609
2014-08-22T14:45:11+03:00
(43+x)+537-214=975
43+x=975+214-537
43+x=652=> x=652-43=>x=609