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2014-10-27T19:32:27+02:00
2x=-7
x=-7/2

-3x=5
x=-5/3


-6x=-15
x=15/6
x=5/2


-4x=12
x=12/4
x=3


-8x=0
x=o


14x=-21

x=-21/7
x=-3
2 5 2
2014-10-27T19:56:35+02:00