Evaluate the following expression.
\[-8 \times (-10) - 7 \times \dfrac{1}{-1}\]
We start by simplifying each multiplication separately:
\[-8 \times (-10) = 80.\]
\[7 \times \dfrac{1}{-1} = 7 \times (-1) = -7.\]
Now, we substitute the simplified values back into the original expression:
\[80 - (-7).\]
Minus a negative is the same as plus a positive, so we have:
\[80 + 7.\]
Adding, we find:
\[80 + 7 = \boxed{87}.\]