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2014-11-11T19:08:25+02:00
2(x – 3) + 5x – 14 = 7(x – 1)
2x-6+5x-14=7x-7
7x-20=7x-7
7x-7x=20-7
0≠13
1 5 1
2014-11-11T19:09:30+02:00