Solve for x.

To solve the equation (10x - 8x = 12), first simplify the left side:

[ 10x - 8x = 2x ]

So the equation becomes:

[ 2x = 12 ]

Next, divide both sides by 2 to isolate (x):

[ x = \frac{12}{2} ]

This simplifies to:

[ x = 6 ]

Thus, the solution is:

[ \boxed{6} ]