To solve this equation, we need to simplify the left side first.

-(-6)/12 + x = 9/48

6/12 + x = 9/48

Now, let's simplify the fractions.

1/2 + x = 9/48

To add fractions, we need a common denominator. In this case, the least common multiple of 2 and 48 is 48.

So, we need to convert 1/2 to have a denominator of 48.

1/2 = (1/2) * (24/24) = 24/48

Now, the equation becomes:

24/48 + x = 9/48

Next, we can combine the fractions on the left side.

(24 + x)/48 = 9/48

Since the denominators are the same, we can set the numerators equal to each other.

24 + x = 9

Now, we can solve for x.

x = 9 - 24

x = -15