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2014-10-25T14:53:18+03:00
(8+3x)*14=1762+30
(8+3x)*14=1792     | :14
8+3x=128
3x=128-8
3x=120                 | :3
x=40
2014-10-25T14:58:42+03:00
(8+3x)x14=1762+30
               =1792
8+3x=1792:14
       =128
3x=128-8
    =120
x=120:3
x=40