2(1-4х)-12+3х=15

To solve the equation, we need to simplify it by first distributing the 2 on the left side:

2(1) - 2(4x) - 12 + 3x = 15

Now we simplify:

2 - 8x - 12 + 3x = 15

Combine like terms:

-5x - 10 = 15

Next, add 10 to both sides:

-5x = 25

Finally, divide by -5 to solve for x:

x = -5

So x = -5 is the solution to the equation.