-12
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-2x-6= -2x-6Another answer:-2x-6 = 2x+6-2x-2x = 6+6-4x = 12x = -3
-2x-6 = 14 -2x = 14+6 -2x = 20 x = -10
6 + 2x =2(3 + x)
It is a contradiction! 6x - 4x - 6 = 2x 2x - 6 = 2x -6 = 0 false
-6 + 4x + (9-2x) = -6 + 4x + 9 - 2x = [ 3 + 2x ]