3х(4-2х)-6-2х+4

To simplify the expression, let's start by distributing the 3 and the -2x terms:

3(4-2x) - 6 - 2x + 4 = 12 - 6x - 6 - 2x + 4

Next, combine like terms:

= (12 - 6) + (-6x - 2x) + 4 = 6 + (-8x) + 4 = 10 + (-8x)

So the simplified expression is:

10 - 8x