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2014-10-14T22:47:08+03:00
(x+3)*2-81/9=1
(x+3)*2-9=1
(x+3)*2=9+1
(x+3)*2=10
x+3=10:2
x+3=5
x=5-3
x=2

2014-10-14T22:47:13+03:00