-8
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x*x - 8x +16 = 0 x*x = 8x + 16 x - 16 = _/8x x_/-4 = 2 x = 2
8x + 16 = 6x -> 2x + 16 = 0 -> 2x = -16 -> x = -8
8x + 9.16 = 4x + 16 8x - 4x = 16 - 9.16 4x = 6.84 x= 1.71
We don't see a conflict. 'x' is 2, and there shouldn't be much debate about that.
You add 8x to each side. This gives you 5 = 16. Since this has no solution, the original equation doesn't have any solution, either.