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2014-11-09T11:47:25+02:00
2 (3x-4)+5 (6x-7)-7x=16 (x+15)-106x-8+30x-35-7x=16x+240-1029x-43=16x+230
29x-16x=230+43
13x=273
x=273:13
x=21
1 5 1