To solve the equation, we can start by simplifying the left side:

-( -6)/12 = 6/12 = 1/2

So the equation becomes:

1/2 + x = 9/48

Next, we can simplify the right side:

9/48 = 3/16

Now, we can rewrite the equation as:

1/2 + x = 3/16

To solve for x, we can subtract 1/2 from both sides:

x = 3/16 - 1/2

To subtract these fractions, we need a common denominator, which is 16:

x = 3/16 - 8/16

Now, we can subtract the numerators:

x = -5/16

Therefore, the solution to the equation is x = -5/16.