To calculate this expression, we first need to simplify the fractions:

-(-9 3/7) = 9 3/7 = 66/7

Next, we can rewrite the expression as:

(66/7) x (7/11) + (-2.9)

Now, we can multiply the fractions:

(66/7) x (7/11) = (66 x 7) / (7 x 11) = 462 / 77 = 6

Finally, we can add -2.9 to the result:

6 + (-2.9) = 3.1

Therefore, the final answer is 3.1.