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2014-03-16T17:03:16+01:00
5(x-2)+2(1-3x)=7x+12
5x - 10 + 2 - 6x = 7x + 12
-x - 8 = 7x + 12
-x - 7x = 12 + 8
-8x = 20
x = 20/(-8) = -2,5