To solve this equation, we can start by simplifying each fraction separately.

For the first fraction, -3/(x-1), we can't simplify it any further.

For the second fraction, (y-2)/8, we can simplify it by multiplying both the numerator and denominator by 2 to get (2y-4)/16.

Now we have the equation:

-3/(x-1) = (2y-4)/16 = -12/16

Since the last two fractions are equal, we can set them equal to each other:

(2y-4)/16 = -12/16

To eliminate the denominators, we can multiply both sides of the equation by 16:

16 * (2y-4)/16 = 16 * (-12/16)

This simplifies to:

2y-4 = -12

Next, we can add 4 to both sides of the equation:

2y-4+4 = -12+4

This simplifies to:

2y = -8

Finally, we can divide both sides of the equation by 2 to solve for y:

(2y)/2 = -8/2

This simplifies to:

y = -4

So the solution to the equation is y = -4.