10 = - 1/8 * d

To find the value of d in the equation 10 = -1/8 * d, we need to isolate d.

First, we can multiply both sides of the equation by -8 to eliminate the fraction:

10 * -8 = (-1/8 * d) * -8

-80 = d

Therefore, the value of d in the equation is -80.