Solve (-6)+(-7)+13: Evaluating the Sum to Zero

$(-6)+(-7)+13\text{?}0$

Let's first solve the equation:

$(-6)+(-7)+13=$

We'll need to locate -6 on the number line and then move 7 steps to the left (since -7 is less than zero):

After doing this, we will have reached the number -13.

Now we'll move 13 steps to the right (since 13 is greater than zero):

After doing this, we will have reached the number 0.

The solution to the equation is:

$(-6)+(-7)+13=0$

Therefore, the appropriate sign will be:

$0=0$