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2014-11-13T15:23:10+02:00
2*{10+3*[20-2*(18-3*6)]}-5x=70
2*[10+3*(20-2*0)]-5x=70
2*(10+3*20)-5x=70
2*70-5x=70
140-5x=70
5x=70
x=14
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